Worksheet
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Countdown Challenge: Triangle Inequality Theorem

For Students 7th - 8th
For this triangle inequality worksheet, students test the Triangle Inequality Theorem. They measure the sides of given triangles, identify the type of triangle, and name angles in the triangle. The one-page worksheet contains 36 problems.
Lesson Plan
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Exploring Pythagorean Theorem

For Teachers 8th
Eighth graders explore the Pythagorean Theorem. They use Geometer's Sketchpad and explore features of various figures. Students use the software to build a figure using the given measurements.
Lesson Plan
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Comparing Roots After Rotation of Ninety Degrees

For Teachers 9th - 12th
Students conduct an experiment and use different measurements of a single root to illustrate the mechanism of plant movement.
Lesson Plan
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Perimeter All Around

For Teachers 3rd - 5th
Students explore perimeter and area of regular and irregular polygons. They experiment with color squares and create different arrangements using the same number squares. Then they compare the area and perimeter measurements of each.
Worksheet
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Archimedes

For Students 7th - 8th
For this Archimedes worksheet, students complete and respond to 4 different problems related to different triangles. First, they find the midpoint of each side of a given triangle. Then, students connect the midpoints with the opposite...
Activity
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Illustrative Mathematics

Midpoints of the Sides of a Paralellogram

For Teachers 9th - 12th Standards
This task asks learners to prove that the segment joining the midpoints of two sides of a parallelogram is both congruent and parallel to an adjacent side of the parallelogram. The activity would be good to use in a discussion about how...
Worksheet
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Word Problems

For Students 9th - 10th
In this geometry instructional activity, students read a scenario and translate it using geometric concepts to find their answers. There are 15 questions with an answer key.
Worksheet
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Identifying Similar Triangles

For Students 10th
In this identifying similar triangles activity, 10th graders solve 6 different types of problem that include identifying and comparing similar triangles. First, they identify the three ways that determine whether two triangles are...
Worksheet
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Using Algebraic Equations in Geometry Problems

For Students 6th
In this using algebraic equations in geometry problems worksheet, 6th graders write an equation to solve each addition problem about geometry, then find the solution.
Worksheet
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Parts of Similar Triangles

For Students 10th
In this parts of similar triangles learning exercise, 10th graders solve and complete 15 different statements related to naming the parts found in similar triangles. First, they identify each definition stated that describes an everyday...
Worksheet
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Making a Periscope

For Students 4th - 5th
In this designing a periscope worksheet, students follow the directions to collect materials and make a periscope. Students answer 5 questions.
Lesson Plan
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Isosceles Triangles

For Teachers K - 2nd
Pupils investigate triangles. In this shapes geometry lesson, students define and state the attributes for equilateral, scalene, and isosceles triangles. Pupils locate the prefix "tri" in a variety of words and make connections with the...
Worksheet
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Parallelograms

For Students 10th
In this parallelograms activity, 10th graders identify and describe a quadrilateral, a diagonal, and a parallelogram in 7 different problems. First, they find the values of x, y, and z in each quadrilateral to prove that it is a...
Lesson Plan
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Geometry, Measurement & Reasoning

For Teachers 7th - 9th
Students complete worksheets involving rotational symmetry. In this geometry activity, students complete worksheets to identify rotational symmetry and rotations. They compare and contrast rotated figures. Students examine the...
Worksheet
Curated OER

Trigonometry Ratios in Right Triangles

For Students 10th
In this trigonometry ratios in right triangles worksheet, 10th graders solve 10 different trigonometric ratios that apply to right triangles. First, they define a trigonometric ratio and its three most common ratios, sine, cosine, and...
Lesson Plan
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The Circle's Measure

For Teachers 3rd - 7th
Students explore circumference and diameter. In this math lesson, students apply their knowledge of circumference and diameter to solve mathematical riddles. Students apply this knowledge to find circumference and diameter of various...

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