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\n\n24\nItems in Unit\n\n
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\n\"Geometry\n\n
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\nLesson Planet Curated\n
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\nGeometry Unit 4: Triangle Congruence\n

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\n\nFor Teachers\n\n9th - 12th\n\nStandards\n
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\nThe Geometry Unit 4: Triangle Congruence unit module contains five lessons—each with a video, teacher reference, practice packets, solutions, and corrective assignments. To begin, scholars review the types of triangles, then investigate...\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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\n\n12\nItems in Topic\n\n
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\n\"Math\n\n
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\nLesson Planet Curated\n
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\nMath Antics Geometry Video Lessons\n

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\n\nFor Teachers\n\n4th - 8th\n\nStandards\n
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\nThe point of this collection of 12 videos is to introduce learners to three basic parts of geometry—points, lines, and planes. The presenter provides definitions, shows how to classify shapes, provides examples, and shows how to use...\n
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\n\n29\nItems in Unit\n\n
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\n\"Geometry\n\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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Instructional Video3:02
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\n\"Isosceles\n\n
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\nCK-12 Foundation\n
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\nIsosceles Triangles: Lesson\n

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\n\nFor Students\n\n8th - 11th\n\nStandards\n
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\nTwo sides give us two angles. A segment of a playlist on basic geometry revisits isosceles triangles. The presentation explains several properties and theorems related to isosceles triangles.\n
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\n\"Isosceles\n\n
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\nIsosceles Triangles\n

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\n\nFor Teachers\n\n4th - 5th\n
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\nIn need of a fun way to define an isosceles triangle? This activity has learners fold a paper in half and then cut it to create an isosceles triangle. They determine the line of symmetry by folding the triangle in half and then use the...\n
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Instructional Video6:29
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\n\"Pythagoras\n\n
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\nCorbett Maths\n
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\nPythagoras Rectangles and Isosceles Triangles\n

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\n\nFor Students\n\n7th - 12th\n\nStandards\n
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\nWhen does the Pythagorean Theorem come in handy? An intriguing video uses the Pythagorean Theorem to solve problems other than simply finding the length of a side of a right triangle. Pupils find the diagonal of a rectangle and the...\n
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\n\nGet Free Access\n\nSee Review\n
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Instructional Video4:28
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\n\"How\n\n
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\nHow Do You Find Missing Angles in an Isosceles Triangle?\n

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\n\nFor Teachers\n\n6th - 8th\n
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\nFinding the missing values of two angles in an isosceles triangle is not as difficult as it sounds. But how can two out of three angle's measurements be found? Well, there are special properties about an isosceles triangle which make...\n
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Instructional Video3:40
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\nHow Do You Find Missing Angles in an Isosceles Triangle Using Right Triangles?\n

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\n\nFor Teachers\n\n6th - 8th\n
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\nGiven an isosceles triangle, and the value of one angle, find the missing values. There are some special properties about isosceles triangles. Use the triangle sum theorem to solve this problem. Watch this video to see how the instructor...\n
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\n\"Geometry\n\n
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\nCurated OER\n
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\nGeometry Journal: Isosceles Triangles\n

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\n\nFor Teachers\n\n10th - 12th\n
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\nIn this isosceles triangles worksheet, students justify and determine the symmetry of an isosceles triangle. They explore the bisector of rectangles. This three-page worksheet contains two problems. Answers are listed on page three.\n
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\n\"Isosceles\n\n
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\nIsosceles Triangle Theorem\n

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\n\nFor Teachers\n\n8th - 10th\n
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\nFor this geometry worksheet, students differentiate between regular triangles and isosceles triangles. They apply the converse theorem and the vertex angle. There are eleven questions with an answer key.\n
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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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\nEngageNY\n
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\nBase Angles of Isosceles Triangles\n

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\n\nFor Students\n\n9th - 10th\n\nStandards\n
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\nBuild confidence in proofs by proving a known property. Pupils explore two approaches to proving base angles of isosceles triangles are congruent: transformations and SAS. They then apply their understanding of the proof to more complex...\n
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Instructional Video7:11
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\n\"The\n\n
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\nKrista King Math\n
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\nThe Isosceles Triangle Theorem is Actually Really Simple!\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nThe isosceles triangle comes with its own set of properties. A lecturer shows how to apply the Isosceles Triangle Theorem to find missing side lengths or angle measures. The final example involves both square roots and quadratic...\n
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\n\"SAT\n\n
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\nKhan Academy\n
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\nSAT Prep: Test 1 Section 9 Part 3\n

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\n\nFor Students\n\n9th - 12th\n
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\nIf it takes a long time to complete the problems on the math SAT, it doesn't matter if they are correct - the problems that are left over will count against the student's score. Sal takes care to show quicker ways to complete problems...\n
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\n\"How\n\n
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\nHow many isosceles Triangles Can You Find?\n

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\n\nFor Teachers\n\n5th\n
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\nFifth graders solve problems while examining a variety of isosceles triangles.  In this isosceles triangle lesson, 5th graders examine shapes to find their characteristics.  Students pay particular attention to the...\n
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\n\"Geometry\n\n
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\nCurated OER\n
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\nGeometry Regents Questions: Isosceles Triangle Theorem\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nIn this isosceles triangle worksheet, students solve 19 multiple choice and short answer problems.  Students use the isosceles triangle theorem to determine unknown angle measures.\n
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\nHow many isosceles triangles can you find?\n

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\n\nFor Teachers\n\n7th\n
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\nSeventh graders recognize the characteristics of isosceles triangles. For this isosceles triangle lesson, 7th graders use geoboards to create isosceles triangles. Students record results and explain why they have an isosceles triangle.\n
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\n\"Isosceles\n\n
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\nIsosceles Triangles\n

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\n\nFor Students\n\n9th - 12th\n
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\nIn this geometry worksheet, students set up equations to solve for the missing angle or side of an isosceles triangle. All the equations turn out to be linear and not quadratic. There are 15 questions. \n
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\n\"Sea\n\n
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\nCurated OER\n
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\nSea Squares\n

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\n\nFor Teachers\n\n10th\n
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\nIn this sea squares worksheet, 10th graders solve 5 different problems that include various geometrical figures. First, they draw a number line using one color. Then, students draw 2 obtuse angles and 3 isosceles triangles with different...\n
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\n\"2D\n\n
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\nMath Salamanders Ltd.\n
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\n2D Shape Sheet Isosceles Triangles\n

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\n\nFor Students\n\n3rd - 4th\n\nStandards\n
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\nFor this isosceles triangle worksheet, students cut or count the triangles on this sheet. Students cut or count out 13 isosceles triangles that are all different colors.\n
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\n\"Isosceles\n\n
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\nCurated OER\n
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\nIsosceles Triangles\n

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\n\nFor Teachers\n\n9th - 10th\n
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\nStudents identify the properties of an isosceles triangle. In this geometry instructional activity, students find the midpoint, median and angle bisector of a triangle. They construct angle bisectors and measure missing angles.\n
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\n\"Isosceles\n\n
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\nIsosceles Triangles\n

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\n\nFor Teachers\n\nK - 2nd\n
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\nStudents investigate triangles. In this shapes geometry instructional activity, students define and state the attributes for equilateral, scalene, and isosceles triangles. Students locate the prefix \"tri\" in a variety of words and make...\n
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Worksheet
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\n\"The\n\n
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\nThe Isosceles Triangle Problem\n

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\n\nFor Students\n\n10th\n
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\nFor this geometry worksheet, 10th graders solve a problem involving an isosceles triangle.  The problem appears to be deceptively easy, but instead requires the use of trigonometry to arrive at a correct solution.  The one page...\n
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