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Geometry Definitions

For Students 8th - 12th
In this geometry worksheet, learners match the geometry term with its definition. Students match 12 geometry terms with their definitions.
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Worksheet
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Triangles

For Students 6th - 10th
In this triangles worksheet, students solve for the missing angles and missing sides on the triangles given. Students complete 12 problems total.
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Geometry

For Students 7th - 8th
For this line and angles worksheet, learners explore basic geometry vocabulary.  They classify polygons.  Students determine the area and perimeter of given shapes.  They examine the parts of a circle, find volume and surface area of...
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Lesson Plan
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Measuring Body Angles

For Teachers 8th - 10th
Learners use technology to graph and compare angles. In this geometry lesson, students range of motion in the environment. They identify the missing parts of polygons using similarity and congruence.
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Worksheet
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More on Tessellations

For Students 10th
In this tessellations worksheet, 10th graders solve 3 different word problems that include creating various tessellations. First, they group pentagons around a vertex so the angles add up to 360 and determine whether the pentagons can...
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Geometry Worksheet #13

For Students 10th
In this geometry instructional activity #13 instructional activity, 10th graders work in groups to solve 6 geometry problems, involving measurement of angles.
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Similar Right Triangles-Introductions to Trigonometry

For Students 9th - 10th
For this geometry worksheet, students examine similar right triangles as the basis for the foundation of trigonometry. Students define the basic trigonometric functions and use a calculator to find the trigonometric value of an angle....
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Lesson Plan
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Isosceles Triangles

For Teachers 9th - 10th
Students identify the properties of an isosceles triangle. For this geometry lesson, students find the midpoint, median and angle bisector of a triangle. They construct angle bisectors and measure missing angles.
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Pythagorean Theorem

For Teachers 7th - 10th
Pupils find the different ratios of a triangle. In this geometry lesson, students use the Pythagorean Theorem to solve for missing sides and angles on a right triangle. They use a robot to create a right triangle.
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Trig is SOH Easy!

For Teachers 7th - 10th
Students derive the six trigonometric identities. In this trigonometry lesson plan, students review the parts of a right triangle and use the Pythagorean theorem as a guide to find the trig identities. They find sine, cosine and tangent...
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Lesson Exchange: Polygons (Middle, Mathematics)

For Teachers 6th - 7th
Students discover the relationship between the sides of a polygon and the number of diagonals that can be drawn from one vertex, the number of triangles that those diagonals form, and the sum of the interior angles of that polygon.
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Arithmetic Artistry

For Teachers 2nd - 4th
Students create a classroom quilt that illustrates the many unique ways that students use math skills.
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Rotational Symmetry

For Students 5th
In this rotational symmetry learning exercise, 5th graders determine if the two figures have rotational symmetry. This learning exercise explains and provides examples of rotational symmetry.
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Reflection Experiments

For Teachers 7th
Seventh graders investigate with light rays. In this light instructional activity, 7th graders determine the angle of reflection using simple materials. They continue the investigation by exploring the theory that light which is not...
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Duplicating Segments and Angles

For Teachers 10th
Tenth graders investigate geometric construction.  In this geometry lesson, 10th graders explore the procedure for copying an angle and a segment.  The lesson emphasizes the difference between a sketch, a drawing, and a construction and...
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Making Shapes

For Teachers 10th
Tenth graders construct geometric figures using compasses and protractors.
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Drawing a Triangle with Cabri Junior

For Teachers 9th - 12th Standards
Learners draw triangles on their graphing calculators using the Cabri Junior application. In this graphing calculator lesson, students follow step by step directions to create triangles on their calculator. They identify the type of...
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Types of Triangles

For Teachers 5th
Fifth graders explore the required functions of the Geometer's Sketchpad. Using the computer software, they construct similar triangles and identify them by angles and sides. Students classify triangles. Afterward, they complete problems...
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Lesson Plan
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Algebra/Geometry Institute: Area of Polygons

For Teachers 6th - 8th
Students find the area of polygons.  In this area of polygons lesson, students find the area of parallelograms, rectangles, squares, and other polygons.  They identify each given figure and determine the appropriate formula needed to...
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SAS Similarity Theorem

For Teachers 9th - 10th
Learners identify and use the similarity theorem. In this geometry lesson, students differentiate between congruent and similar triangles. They solve problems using the computer modifying shapes by dragging.
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Lesson Plan
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Pythagorean Theorem

For Teachers All
Students explore how the Pythagorean Theorem works and how to apply it.
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Pythagorean Theorem

For Teachers 9th - 12th
Learners are introduced to the Pythagorean theorem. They use three different activities that give students the opportuntiy to observe triangles, and use the Pythagorean theorem and practice different ways of determining areas of...
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Lesson Plan
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Geometers Sketchpad Practice

For Teachers 9th - 10th
Young scholars create polygons using geometers sketchpad. For this geometry lesson, students construct the interior angles of polygons and label the different points. They estimate and measure the different parts as they draw conclusion.
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Lesson Plan
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Classifying and Constructing Corners

For Teachers 5th
Fifth graders, after seeing Honeycomb examples, complete a Classifying Angles worksheet, Clock worksheet, and Defining Angles worksheet.

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