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\n\"Geometry\n\n
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\nLesson Planet Curated\n
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\nGeometry Unit 1: Tools for Geometry\n

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\n\nFor Teachers\n\n9th - 12th\n\nStandards\n
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\nSix resources make up the first unit in the Flipped-Mastery series for geometry. In the first lesson, scholars learn how to identify and name points, lines, and planes. They work with four postulates, then practice the skills for naming...\n
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\n\n12\nItems in Course\n\n
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\n\"Flipped\n\n
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\nLesson Planet Curated\n
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\nFlipped Math: Geometry\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nImagine taking a complete geometry course remotely! Eleven units make up the My Geometry course. Each unit follows the Flipped-Mastery cycle of learning, divided into two semesters. Pupils watch and take notes on a video that details the...\n
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\n\nGet Free Access\n
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Instructional Video4:04
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\n\"Angle\n\n
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\nCK-12 Foundation\n
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\nAngle Bisectors: Lesson\n

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\n\nFor Students\n\n8th - 11th\n\nStandards\n
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\nApply bisectors and distances to angles. Using the definition of an angle bisector, a portion of a geometry playlist draws a diagram showing the angle bisector. The video details properties of an angle bisector and their converses....\n
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\n\nGet Free Access\n\nSee Review\n
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Instructional Video2:43
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\n\"Proportions\n\n
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\nCK-12 Foundation\n
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\nProportions with Angle Bisectors: Lesson\n

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\n\nFor Students\n\n8th - 11th\n\nStandards\n
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\nHalf at one end becomes proportional on the other. As part of a basic geometry playlist, the video introduces the Angle Bisector Theorem. The presentation uses the theorem to find missing lengths in triangles.\n
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\n\"Geometry/Math\n\n
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\nCurated OER\n
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\nGeometry/Math A Regents Questions: Angle Bisectors\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nIn this angle bisector worksheet, students solve five short answer and multiple choice problems. Students construct angle bisectors using a compass.\n
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\n\nGet Free Access\n\nSee Review\n
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Instructional Video2:06
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\n\"Angle\n\n
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\nCorbett Maths\n
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\nAngle Bisector\n

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\n\nFor Students\n\n8th - 11th\n\nStandards\n
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\nCut it in half with a compass and straightedge! Using construction tools, a video shows how to create an angle bisector. The presenter points out what it means to bisect an angle in terms of the measure and distances from the sides of...\n
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\n\nGet Free Access\n\nSee Review\n
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\n\"Angle\n\n
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\nCurated OER\n
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\nAngle Bisectors and Medians of Quadrilaterals\n

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\n\nFor Teachers\n\n9th - 12th\n\nStandards\n
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\nYoung scholars investigate the properties of quadrilaterals formed by angle bisectors of a given quadrilateral and quadrilaterals formed by the medians of quadrilaterals. This Cabri Jr. instructional activity provides opportunity for...\n
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Interactive
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\n\"Congruent\n\n
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\nCK-12 Foundation\n
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\nCongruent Angles and Angle Bisectors: Bisecting Pepperoni Pizza\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nWho doesn't like pizza?  A creative lesson uses a piece of pizza to explore angle bisectors and congruent angles. Young scholars work through a simulation to create congruent slices of pizza by analyzing an angle bisector. They then...\n
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Worksheet
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\n\"Angle\n\n
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\nCurated OER\n
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\nAngle Bisectors\n

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\n\nFor Students\n\n10th\n
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\nIn this angle bisector worksheet, 10th graders solve and complete 23 various types of geometry problems. First, they find the angles listed in the figure shown. Then, students determine the sum of the interior angles of a polygon. They...\n
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Lesson Plan
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\n\"Similarity\n\n
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\nEngageNY\n
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\nSimilarity and the Angle Bisector Theorem\n

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\n\nFor Teachers\n\n9th - 10th\n\nStandards\n
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\nIdentifying and verifying reproducible patterns in mathematics is an essential skill. Mathematicians identify the relationship of sides when an angle is bisected in a triangle. Once the pupils determine the relationship, they prove it to...\n
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\n\"Altitude,\n\n
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\nCurated OER\n
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\nAltitude, Median, and Angle Bisector of a Triangle\n

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\n\nFor Teachers\n\n9th - 12th\n\nStandards\n
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\nLearners investigate the special properties of an altitude, a median, and an angle bisector and explore how these special segments divide the area of a triangle. The dynamic nature of Cabri Jr. allows pupils to form and verify conjectures.\n
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Activity
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\n\"Find\n\n
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\nIllustrative Mathematics\n
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\nFind the Angle\n

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\n\nFor Teachers\n\n7th - 10th\n\nStandards\n
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\nThis a fun problem for young geometers to play with while gaining important insight into deductive reasoning. Some will find the answers very quickly, others might take a less direct path, but all will use their knowledge of the sum of...\n
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\n\"Perpendicular\n\n
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\nCurated OER\n
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\nPerpendicular and Angle Bisectors\n

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\nFor this geometry worksheet, 10th graders solve problems that are based on the theorems associated with perpendicular and angle bisectors of a triangle.  An application on the coordinate plane is included.  The one page...\n
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\n\"Construction:\n\n
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\nCurated OER\n
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\nConstruction: Angle Bisector\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nIn this geometry worksheet, high schoolers construct angle bisectors of two provided rays using a straightedge and a compass. There are 6 questions.\n
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Lesson Plan
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\n\"Angle\n\n
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\nCurated OER\n
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\nAngle Bisectors\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nStudents identify different angles. In this geometry lesson, students identify different properties of triangles. They find the altitude, median and angle bisector.\n
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Worksheet
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\n\"Angle\n\n
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\nCurated OER\n
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\nAngle Bisectors\n

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\n\nFor Students\n\n10th\n
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\nIn this angle bisectors learning exercise, 10th graders solve and complete 12 different problems. First, they find the value of xand the measure of the indicated angles for each situation. Then, students find the values of each indicated...\n
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Instructional Video17:08
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\n\"Measuring\n\n
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\nFlipped Math\n
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\nMeasuring Angles\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nAn informative presentation shows pupils how to name and measure angles. Scholars revisit the different types of angles and their definitions and use their knowledge of what an angle bisector is to solve algebraic problems. At the end,...\n
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\n\"Indirectly\n\n
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\nCurated OER\n
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\nIndirectly Direct\n

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\n\nFor Teachers\n\n4th - 8th\n
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\nStudents use prior knowledge of angle and lines as they conduct an experiment with a rolling marble to determine the shape of a mystery object located under a metal pie tin.\n
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Lesson Plan
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\n\"Tangent\n\n
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\nEngageNY\n
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\nTangent Segments\n

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\n\nFor Teachers\n\n9th - 12th\n\nStandards\n
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\nWhat's so special about tangents? Learners first explore how if a circle is tangent to both rays of an angle, then its center is on the angle bisector. They then complete a set of exercises designed to explore further properties and...\n
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Worksheet
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\n\"Isosceles\n\n
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\nMt. San Antonio Collage\n
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\nIsosceles Triangles and Special Line Segments\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nUnder which conditions can a triangle be classified as isosceles? High schoolers practice identifying isosceles triangles and special line segments, including angle bisectors, medians of triangles, and perpendicular bisectors of sides of...\n
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\n\"Points\n\n
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\nEngageNY\n
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\nPoints of Concurrencies\n

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\n\nFor Teachers\n\n9th - 10th\n\nStandards\n
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\nYou say that perpendicular bisectors intersect at a point? I concur! Learners investigate points of concurrencies, specifically, circumcenters and incenters, by constructing perpendicular and angle bisectors of various triangles.\n
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Worksheet
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\n\"Chapter\n\n
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\nCurated OER\n
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\nChapter 5 Final Review Extra Problems. Triangles\n

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\nIn this triangles worksheet, students identify the median, altitude, segment, angle bisector, perpendicular bisector and triangle midsegment of triangles.  They find the perimeter of triangles.  This three-page worksheet...\n
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Worksheet
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\n\"Angle\n\n
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\nCurated OER\n
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\nAngle Bisector\n

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\nIn this geometry worksheet, 10th graders use a straightedge and a compass to construct the bisector of a given angle.  The one page worksheet contains two problems.  Answers are provided. \n
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Interactive
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\n\"Bisectors\n\n
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\nCK-12 Foundation\n
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\nBisectors of Line Segments and Angles: Cut an Angle\n

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\n\nFor Students\n\n6th - 10th\n
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\nExplore constructions through an interactive online lesson. Given an example of an angle bisector construction, learners investigate the markings to determine the method used. Challenge questions help solidify the steps. \n
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