Worksheet
Curated OER

Perimeter and Area

For Students 4th - 6th
In this perimeter and area learning exercise, students find area and perimeter of 9 triangles. A website reference is given for additional resources.
Worksheet
Curated OER

Area and Perimeter of Various Shapes

For Students 5th - 6th
In this area and perimeter worksheet, students find each for 6 given shapes. A website reference for additional resources and an answer key are provided.
Worksheet
Curated OER

Perimeter and Area #6

For Students 4th - 6th
For this perimeter/area worksheet, learners find area and perimeter for a set of 9 triangles. A website reference is given for additional activities.
Unit Plan
Mathematics Vision Project

Module 5: Modeling with Geometry

For Students 9th - 12th Standards
Solids come in many shapes and sizes. Using geometry, scholars create two-dimensional cross-sections of various three-dimensional objects. They develop the lesson further by finding the volume of solids. The module then shifts...
Activity
1
1
Illustrative Mathematics

Hexagonal Pattern of Beehives

For Teachers 9th - 12th Standards
Young geometers and biologists investigate the math of nature in an activity that is just the bee's knees. Participants will study the tessellations of hexagons in a beehive, along with the natural rationale behind the specific shape....
Unit Plan
Mathematics Vision Project

Module 7: Modeling with Geometry

For Teachers 9th - 12th Standards
Model good modeling practices. Young mathematicians first learn about cross sections and solids of revolution. They then turn their attention to special right triangles and to the Laws of Sine and Cosine.
Lesson Plan
1
1
Cord Online

Pyramids and Cones

For Teachers 8th - 11th Standards
Young mathematicians find the surface area and volume of a square pyramid and a cone. In what looks like a typical activity out of a textbook, you'll find an activity where learners find an unknown measurement of a pyramid or...
Worksheet
Lane Community College

Review Sheets: Geometry

For Students 8th - 11th
Full of problems with polygons, angles, lines, and triangles, your learners get a multi-page packet that provides all they need to know. It contains many of the standard problem types as well as some more challenging questions. 
Lesson Plan
Teachers Network

A World of Symmetry: Math-Geometry

For Teachers 4th - 6th
Define and identify the three basic forms of symmetry translation, rotation, and glides with your class. They cut out and arrange paper pattern blocks to illustrate symmetry, create a Cartesian graph, and design a rug with a symmetrical...
Worksheet
Curated OER

Leveled Problem Solving Areas of Triangles and Trapezoids

For Students 6th
In this geometry worksheet, 6th graders calculate the area of triangles and trapezoids using the given formulas. They use the formulas to find measurements of lines that are part of the triangles and trapezoids.
Worksheet
Curated OER

Bermuda Triangle: Map Activity

For Students 4th - 5th
In this Bermuda triangle worksheet, students complete a set of 4 questions using a given map of the Bermuda triangle. Answers are included on page 2.
Lesson Plan
Curated OER

Area, Perimeter, Circumference

For Teachers 6th
Sixth graders use different measuring tools to measure area, perimeter, and circumference of different shapes. In this measurement lesson plan, 6th graders measure parallelograms, triangles, and circles.
Lesson Plan
Curated OER

Twenty-Five Measures of the Angles of a Triangle Problems

For Teachers 9th - 10th
In this triangle worksheet, students calculate the measures of the angles or the sums of the measures of the angles in twenty-five triangle problems and hands-on activities.  The solutions are provided.
Lesson Plan
Curated OER

Triangles with Collinear Circumcenters

For Teachers 9th - 10th
Learners identify the circumcenter of a triangle. In this geometry lesson, students construct a perpendicular bisector using a straight edge and a compass. They differentiate between triangles and collinear points.
Worksheet
Curated OER

Perimeter and Area of Triangles [C]

For Students 5th - 6th
In this triangle worksheet, students find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
Worksheet
Curated OER

Perimeter and Area of Triangles [D]

For Students 5th - 6th
In this triangle worksheet, students find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
Worksheet
Curated OER

Perimeter and Area of Triangles [E]

For Students 5th - 6th
In this triangle worksheet, learners find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
Interactive
Curated OER

A Trying Triangle Problem

For Students 8th - 10th
For this geometry worksheet, learners calculate the length of the sides of a given triangle. They also find the perimeter and area of the triangles given its side values. There is an answer key with this problem.
Lesson Plan
Curated OER

Why can't We Use SSA to Prove Triangles Congruent?

For Teachers 9th - 10th
Students investigate triangles and congruences. In this geometry instructional activity, students differentiate between inductive and deductive reasoning. They differentiate between similar and congruent triangles.
Lesson Plan
Curated OER

Investigating the Sierpinski Triangle

For Teachers 9th - 11th
Students solve and analyze the sierpinski's triangle. In this geometry lesson, students identify properties and theorem of triangles. They solve problems involving angles and sides of triangles.
Lesson Plan
Curated OER

Pythagorean Theorem: Triangles and Their Sides

For Teachers 8th - 10th
Students investigate triangles and their relationship to each other. In this geometry activity, students solve right triangles using the properties of the Pythagorean Theorem. They differentiate between right, acute, straight and oblique...
Lesson Plan
Curated OER

Isosceles Triangle Investigation

For Teachers 9th - 12th
Learners solve problems with isosceles triangles. In this geometry lesson, students identify and use the properties of triangles to solve their problems. They find the median, altitude, and angles to the triangles.
Lesson Plan
Curated OER

Area of irregular Polygons: Historical Motivator - Lewis and Clark Adventure

For Teachers 7th
Seventh graders find the area of irregular polygons. In this instructional activity on calculating area, 7th graders use the adventures of Lewis and Clark as motivation to learn how to calculate the area of irregular polygons.
Lesson Plan
Curated OER

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.

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