Worksheet
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Sums of Angles in Polygons

For Students 5th - 6th
In this angles in polygons learning exercise, students calculate the sum of internal angles in 2 polygons, and solve for x in an additional 2. A reference web site is given for additional activities.
Lesson Plan
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Angles in Art

For Teachers 5th - 9th
Young scholars utilize their handheld and the Angles program to create a non-objective artwork. Images created by famous artists who have utilized angles in their art work are examined.
Lesson Plan
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Areas of Polygons

For Teachers 8th - 10th
Students calculate the are of regular polygons. In this geometry lesson, students create polygons on the computer and move it around to create different shapes. They explore the area of different polygons and how they inter-relate.
Lesson Plan
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Figure It Out - Polygons

For Teachers 6th
Sixth graders explore different polygons. In this polygon instructional activity, 6th graders examine a rhombus, quadrilateral, parallelogram, and rectangles. Students compare and contrast polygons and research shapes on the Internet.
Lesson Plan
Willow Tree

Common Geometric Figures

For Students 8th - 11th Standards
Geometry could be called the study of figures. An overview of the figures found in a typical geometry course contains a study of different triangles, quadrilaterals, and regular polygons. 
Lesson Plan
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Sea Squares

For Teachers 10th
In 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...
Lesson Plan
Curated OER

Powers and Roots

For Teachers 8th - 10th
Eighth graders determine the square and cube roots of given numbers in this math lesson plan. They determine the missing number in a sequence. Additionally, they calculate the interior and exterior polygon angles.
Worksheet
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Constructions and Loci

For Students 9th - 10th
In this geometry activity, students construct polygons and calculate the different angles formed by each shape. They construct circles, trapezoids, and rectangles and answer 20 questions.
Worksheet
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Wrecked Angle

For Students 9th - 10th
In this geometry instructional activity, students answer questions about triangles and trapezoids as it related to the area of a shape. They make their own polygons and calculate the area.
Interactive
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Interior Angles of Polygons

For Students 9th - 12th
In this online math worksheet, students determine the interior angles of polygons given their exterior measurements. This excellent resource allows the students to check their answers, and to get "hints" should they run into...
Interactive
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Exterior Angles of Polygons

For Students 9th - 12th
In this online math instructional activity, high schoolers find the exterior angles of polgyongs. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific...
Lesson Plan
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Strongest Polygon

For Teachers 9th - 12th
Students define and identify shapes by name. In this geometry lesson, students construct, identify and compare polygons based on the number of sides. They classify each shape based on their angle sum theorem.
Lesson Plan
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Polygon Mobiles

For Teachers 4th - 6th
Learners explore a variety of shapes and angles and create mobiles with information about a selected polygon. Both common and "not-so common" polygons are examined.
Lesson Plan
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Measuring Pattern Block Angles

For Teachers 6th
Sixth graders identify various angles by using pattern blocks. In this measurement instructional activity, 6th graders find out how many degrees are in each of the different angles of the various pattern blocks.
Lesson Plan
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Mandalas : polygons

For Teachers 4th
Fourth graders create mandalas. In this mandala activity, 4th graders look at these polygons in nature and man-made forms. They create their own by using tangrams.
Lesson Plan
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CSI Investigation of Congruence and Similarity

For Teachers 9th - 12th
Students differentiate between similarity and congruence using polygons. In this geometry lesson, students label triangles based on their properties. They find missing sides and angles using the interior sum theorem.
Worksheet
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Midpoints and Bisectors

For Students 9th - 10th
In this geometry instructional activity, students calculate the midpoints of polygons using coordinate pairs. They find the  angle bisector, altitude and median of the given triangles. There are 33 questions.
Lesson Plan
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Properties of Arcs, Lengths and Chords

For Teachers 9th - 11th
Students differentiate between the different properties of arcs, arc lengths, chords, and chord lengths. In this circles lesson plan, students calculate the arc length of a given circle, and find the measure of the inscribed angles of a...
Worksheet
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Transformations and Congruence

For Students 10th
In this transformations and congruence worksheet, 10th graders solve and complete 5 different types of problems. First, they calculate the length of a line giving their answer in 3 significant figures. Then, students prove that two...
Lesson Plan
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Quandaries, Quagmires, and Quadrilaterals

For Teachers 3rd - 5th
Students classify, flip, slide, and turn a quantity of quadrilaterals.
Worksheet
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Area and Perimeter

For Students 10th
In this area and perimeter worksheet, 10th graders solve and complete 18 various types of geometry problems. First, they find the area of a figure shown with consecutive sides perpendicular. Then, students find the area and perimeter of...
Organizer
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Triangle Angle-Sum Theorem

For Students 5th - 8th
In this polygons worksheet, students fill out a graphic organizer about the name of the polygon, the number of sides, the angle sums, and more. Students complete this for 5 polygons.
Lesson Plan
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Tessellation Trial and Error

For Teachers 5th - 8th
In this interactive lesson, students review attributes of equilateral polygons. They are introduced to the concept of a tessellation. Using protractors and pre-cut shapes, students arrange a variety of tiles to create tessellations. They...
Lesson Plan
Curated OER

Regular Polygons

For Teachers 5th
Fifth graders explore polygons. In this math lesson, 5th graders find examples of regular polygons in the classroom and measure the sides of figures to determine if they are regular polygons.

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