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Lesson Plan
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Triangle Inequality Theorem

For Teachers 8th - 10th
Students use the inequality theorem to solve triangles and their properties. In this geometry lesson, students are given spaghetti of different lengths and asked to create triangles. They conclude the necessary length needed to make a...
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Lesson Plan
Curated OER

Geometry Library

For Teachers 5th
Fifth graders write and illustrate books to make a class library of math term books. They utilize vocabulary associated with geometry to make their books. For example, one character may be, Mr. A Cute.
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Lesson Plan
Curated OER

The Truth About Triangles And Proofs

For Teachers 9th - 12th
Students engage in a lesson plan that is about the classification of triangles and the mathematical proofs involved in working with them. They work on a variety of problems that are created by the teacher with the focus upon the...
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Lesson Plan
Curated OER

Pass it On

For Teachers 4th - 6th
Young scholars participate in a class activity to help them master geometric terms and their definitions.
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Worksheet
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Geometry

For Students 3rd - 5th
In this geometry review game worksheet, learners use the provided game cards and calling cards to play a Bingo-like game. Students learn geometric terms while playing a group game.
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Lesson Plan
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Human Geometry Book

For Teachers 3rd - 5th
Students investigate geometric shapes. In this geometry lesson, students read the book The Greedy Triangle and define the shapes mentioned in the book. Students make the shapes by using their bodies.
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Worksheet
Curated OER

Right Triangles

For Students 10th
In this right triangles activity, 10th graders solve and complete 12 various types of problems. First, they solve for x given each of the right triangles shown. Then, students determine the length of the shorter diagonal given the...
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Worksheet
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Regents Exam Questions G.G.21: Centroid, Orthocenter, Incenter, and Circumcenter

For Students 9th - 12th
In this triangles worksheet, students solve 4 multiple choice problems. Students find the centroid, orthocenter, incenter, and circumcenter or various triangles.
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Lesson Plan
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Triangles

For Teachers 6th - 10th
Learners identify triangles in the real world and construct their own triangle using drinking straws. They explore abstract triangles and find additional geometric shapes such as trapezoids. Students discuss similar shapes and examine...
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Lesson Plan
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Quilt Squared

For Teachers 4th - 6th
Students study West Virginia quilts. For this mathematics lesson, students use symmetry, geometric shapes, and patterns to create their own quilt square.
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Lesson Plan
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Shape Up

For Teachers 6th - 8th
Students explore differents types of triangles and quadriaterals. In this polygon lesson, students  model identify and compare two and three dimensional geometric figures. Students create tangrams and discover the difference between...
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Lesson Plan
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Where in the World

For Teachers 4th - 5th
Students explore the global grid system. In this globe lesson, students identify latitude and longitude lines and how these can tell the coordinates of any place. They use the Internet to find the exact coordinates for their town. 
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Lesson Plan
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Quandaries, Quagmires, and Quadrilaterals

For Teachers 3rd - 5th
Students classify, flip, slide, and turn a quantity of quadrilaterals.
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Lesson Plan
Curated OER

The Building Blocks of Geometry

For Teachers 5th
Fifth graders explore geometric building blocks in the real world in order to describe the characteristics and relationships of points, lines, line segments, rays, and planes. This is the first lesson plan in a series of lessons in...
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Worksheet
Curated OER

Geometry Course Review

For Students 10th
In this geometry review set of worksheet, 10th graders solve and complete 139 various types of problems. First, they find the slope-intercept form of a line passing through a point and parallel to a line given. Then, students find the...
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Worksheet
Curated OER

Geoboard Activity

For Students 10th
In this geometry worksheet, 10th graders use geoboards or the grid representation of a geoboard to construct the indicated geometric figure. The three page worksheet contains twenty-seven questions. Answers are not included.
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Lesson Plan
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Fashion Day

For Teachers 8th
Eighth graders practice using basic measurements to solve word problems.They also investigate finding the perimeter of different polygons and define the characteristics to classify the shape as a polygon.
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Lesson Plan
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Making Tangram Pieces by Folding Paper

For Teachers 3rd
Third graders follow directions to make a set of tangram pieces. After reading a story, they compare and contrast the differences between two-dimensional shapes. To end the instructional activity, they use the tangram pieces to create...
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Lesson Plan
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Ovals, Rectangles, Squares, and Triangles

For Teachers 3rd - 5th
Students identify geometrical shapes displayed in photographs of everyday objects in a metropolitan setting.
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Worksheet
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Problem Solving: Strategy: Use Logical Reasoning

For Students 6th
In this problem solving strategy worksheet, 6th graders solve a story problem using the strategies of understand, plan, solve, and look back.
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Worksheet
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Rounding

For Students 3rd - 4th
In this rounding worksheet, students solve 40 problems in which whole numbers are rounded to the nearest 10. 100 or 1000. Students also round to the nearest dollar.
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Lesson Plan
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Pythagorean Theorem

For Teachers 6th - 8th
Young scholars investigate the concept of the Pythagorean Theorem. After conducting independent practice to find the hypotenuse of a triangle, they work with the teacher using examples in the lesson plan. The direct instruction is...
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Lesson Plan
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Equilateral Triangles

For Teachers 4th - 5th
Students examine the attribute of equilateral triangles. For this equilateral triangle lesson, students examine a number of paper triangles to determine how they are classified. They determine how triangles are depicted in Navajo rugs.
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Worksheet
Curated OER

Conditional Statements

For Students 11th
In this conditional statements activity, 11th graders solve and complete 15 various types of problems. First, they determine if a conclusion can be reached from the two statements using the law of detachment or the law of syllogism....

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