Worksheet
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If-Then Statements and Postulates

For Students 10th
In this if-then statements and postulates instructional activity, 10th graders solve 16 various types of geometry problems that include identifying the hypothesis and conclusions of each conditional statement. Then, they write each...
Worksheet
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Algebra Using Proportions

For Students 10th
In this algebra using proportions worksheet, 10th graders solve 14 various types of problems by applying algebra methods to geometry. First, they solve each of 8 proportions using cross products. Then, students use the triangle shown and...
Lesson Plan
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Geoboard Ideas

For Teachers 3rd - 4th
Learners build polygons on their geoboards. In this geometry lesson plan, students build and then draw it on paper and label it. Learners then switch with a partner to try an make a symmetrical shape.
Worksheet
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L-shaped Perimeters

For Students 6th - 8th
In this perimeter worksheet, students calculate the perimeter of L-shaped figures by subtracting to find missing side lengths.  There are 6 questions.
Lesson Plan
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Transformations

For Teachers 9th - 12th
Students explore the concept of transformations. In this transformations lesson, students use Geometer's Sketchpad to construct cyclic and dihedral figures. Students study reflection and rotation symmetry. Students discuss vertical,...
Lesson Plan
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Identifying Patterns

For Teachers K - 1st
Students investigate the elements of a pattern.  In this geometry instructional activity, students identify different shapes in a pattern and discover which shapes are missing in order to extend it.  Students create their own...
Worksheet
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Area Calculations

For Students 5th - 6th
In this area worksheet, students calculate the area of figures and determine the length of x. A reference web site is given for additional activities.
Worksheet
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Compare Area and Perimeter of 2D Shapes

For Students 5th - 6th
In this area and perimeter worksheet, students compare area and perimeter of pairs of figures, determining which has either the greatest area or perimeter. A reference web site is given for additional activities. 
Worksheet
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Calculating Perimeter

For Students 5th - 6th
In this perimeter worksheet, students calculate the perimeter and find given values of 6 figures. A reference web site is given for additional activities.
Worksheet
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Angles measure and classify

For Students 5th - 8th
In this angles worksheet, students measure angles with a protractor and figure out if it is acute, right, obtuse, or straight. Students complete 6 problems.
Worksheet
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Area and Periemeter

For Students 10th
For this geometry worksheet, 10th graders determine the area and perimeters of various quadrilaterals and triangles.  The one page worksheet contains ten problems.  Answers are not provided. 
Lesson Plan
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Tantalizing Tangrams

For Teachers 1st - 4th
Students construct a set of tangrams. In this geometry lesson, students read the book, Grandfather Tang's Story and retell the story using tangrams. Students construct their own set of tangrams using the included worksheets.
Lesson Plan
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Perimeter and Area of Rectangles

For Teachers 6th
Sixth graders solve for the area and perimeter. In this geometry lesson, 6th graders investigate polygons and use a formula to find the area and perimeter. They find the area and perimeter of various polygons.
Worksheet
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The Rectangle/Squares Problem

For Students 9th - 10th
In this Algebra I/Geometry worksheet, students determine the dimensions of a large rectangle that has been cut into smaller squares of various sizes.  The one page worksheet contains one problem with the solutions and an explanation...
Lesson Plan
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Measuring Length: Practice A

For Teachers 9th
Ninth graders investigate the segment addition postulate.  In this geometry instructional activity, 9th graders explore the difference between equal and congruent in relation to segment length.  The instructional activity...
Worksheet
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Surface Area and Volume

For Students 10th
For this geometry worksheet, 10th graders determine the lateral area, surface area, and volume of pyramids and prisms.  The one page worksheet contains five problems.  Answers are not included. 
Worksheet
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Pairs of Lines

For Students 9th - 10th
In this geometry worksheet, students differentiate between perpendicular and parallel planes and lines. They identify segments that are parallel and perpendicular to sides. There are  22 questions.
Worksheet
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Angles and Parallel Lines Homework

For Students 9th - 10th
In this geometry worksheet, students identify the angles formed by parallel lines and a transversal. They differentiate between the angles of a transversal and that of a perpendicular line. There are 14 questions.
Interactive
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Proving Lines Parallel Multiple Choice

For Students 10th - 12th
In this geometry worksheet, students identify parallel lines, examine and interpret diagrams, and find the value of corresponding angles and lines.  This one-page worksheet contains 6 multiple-choice problems.  Answers are...
Worksheet
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Triangle Fundamentals Homework

For Students 9th - 10th
In this geometry worksheet, learners identify the missing angles of non right triangles using the angle sum theorem. They solve for the unknown using algebra. There are 21 questions.
Worksheet
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Applied Trigonometry Problems Day 2

For Students 9th - 10th
In this geometry activity, students apply right triangle trigonometry to find missing distances or angles in real life examples involving angles of depression or elevation. The four page activity contains twelve problems. Answers are not...
Lesson Plan
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Symmetry

For Teachers 9th - 11th
Students identify the different symmetry in polygons. In this geometry lesson, students identify line, rotational and point symmetry in different objects. They find the symmetry with 90% accuracy.
Lesson Plan
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Light Bounce

For Teachers 9th - 11th
Students solve problems involving triangles. For this geometry lesson, students apply properties of triangles to find the missing angles and sides. They identify angles of parallel lines cut by a transversal.
Lesson Plan
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Pythagorean Theorem and Problem Solving

For Teachers 9th - 10th
Learners use the Pythagorean Theorem to solve problems. In this geometry lesson, students identify the properties of a right triangle. They find the missing side and angles of a right triangle.

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