Worksheet
Curated OER

Triangle Fundamentals

For Students 8th - 12th
In this geometry worksheet, students observe a triangle marked with three angles and are given two measures to find the missing third measure. A second diagram is given with six angles. There are 20 questions.
Worksheet
Curated OER

Triangle Inequalities Homework

For Students 10th - 11th
In this geometry activity, students solve problems based on the triangle inequality theorem(s) in which determine if the given lengths can form a triangle, given two sides of a triangle determine the range of the third side, and order...
Worksheet
Curated OER

Geometric Mean

For Students 9th - 12th
In this geometry worksheet, students analyze a given triangle and side lengths, create an equation using the geometric mean, and finally solve the equation. There are 15 questions.
Worksheet
Curated OER

Special Right Triangles Homework

For Students 9th - 12th
For this geometry worksheet, students solve both kinds of special right triangles. There are 12 questions with multiple parts.
Worksheet
Curated OER

Area of 2D Shapes Homework

For Students 9th - 12th
In this geometry worksheet, high schoolers solve the area of 2D shapes starting with squares, rectangles, parallelograms, triangles, rhombi, trapezoids, circles, and ending with area of shaded regions. There are 20 questions.
Lesson Plan
Curated OER

Triangle Inequality Theorem

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

The Golden Ratio

For Teachers 7th
Seventh graders investigate a ratio found in nature and in numerous pieces of artwork throughout history. The lesson is cross-curricular and builds a sense of appreciation of design for students.
Lesson Plan
Curated OER

Quadratic Equations and Parabolas

For Teachers 9th - 11th
Learners graph and solve quadratic equations. In this functions instructional activity, students analyze a quadratic equation using three points on a curve to define the graph of a quadratic function. They find the vertex and intercepts...
Lesson Plan
Curated OER

Scale Drawing

For Teachers 9th - 10th
Students use ratio and proportions to solve problems. In this geometry lesson, students apply ratio and proportions to real life scenarios.
Lesson Plan
Curated OER

The Tangent Ratio

For Teachers 8th - 11th
Students calculate the tangent ratio given a right triangle. In this trigonometry lesson, students use a right triangle and the Pythagorean Theorem to solve problems.
Lesson Plan
Curated OER

Literacy Activity: Mouse Shapes

For Teachers Pre-K - K
Students listen to the book Mouse Shapes and identify the shapes in the book as it is being read. In this shapes lesson, students identify the shapes in the book, and then play with cut out shapes that they can hold in their hands.
Lesson Plan
Curated OER

Deductive and Inductive Reasoning

For Teachers 9th - 10th
Students differentiate between inductive and deductive reasoning. In this geometry lesson, students identify congruent figures and examine logos for congruency.
Lesson Plan
Curated OER

Pick's Theorem

For Teachers 9th - 11th
Students investigate polygons and their lattice. In this calculus lesson, students record data using different methods. They analyze their data and draw conclusions based on the relationship between the area and the interior lattice.
Lesson Plan
Curated OER

Electronic Geometry Notebook

For Teachers 7th - 8th
Students examine the relationship between two and three dimensional shapes. They use their drawings to solve problems. They create a notebook of the formulas and how they relate to the real world.
Lesson Plan
Curated OER

Geometry in Tessellations

For Teachers 3rd - 12th
Young scholars examine tessellations and their geometric properties. Students explore the concept of tessellations and lines, planes, angles, and polygons. Young scholars experiment with the area and perimeter of polygons. Students...
Lesson Plan
Curated OER

Folding Shapes; Are the Sides the Same?

For Teachers 2nd
Second graders explore geometry by experimenting with fold-ables. In this geometric shapes lesson, 2nd graders utilize cutout shapes from construction paper which they experiment with by folding. Students examine the symmetry and...
Lesson Planet Article
Curated OER

Shape Lessons That Connect

For Teachers K - 3rd
Shape lessons provide a way for students to learn about art, science, and math.
Lesson Planet Article
Curated OER

Math Trailblazers and Their Modern Day Connections

For Teachers 3rd - 5th
There are many ways to connect math with topics your children are interested in.
Worksheet
Curated OER

Recognize and Draw Shapes Word Problems

For Students Pre-K - 1st
It's time for a geometry warm up! Geometry scholars examine a figure to determine its name from a list of four choices. The figure, a trapezoid, is large enough for the whole class to see if you were to project this. An explanation at...
Worksheet
Curated OER

Making Two-Dimensional Shapes

For Students Pre-K - 1st
Use this introductory geometry learning exercise as a projected warm-up for your class, doing it together and then revealing the explanation on the bottom half. Learners examine a square and a circle, each bisected by a dotted line. They...
Lesson Plan
EngageNY

Construct a Nine-Point Circle

For Students 9th - 10th Standards
There are an infinite number of points on a circle; can you find nine of them? After putting together a nine-point circle, pupils use constructions and their knowledge of triangle segments to determine the center of the circle. Learners...
Lesson Plan
Curated OER

Vector Investigation: Car Storm Chaser

For Teachers 6th - 11th
Students investigate the relationship between vectors and motion. In this geometry lesson plan, students create a system that exemplifies the principles of motion. They solve for the acceleration, velocity and displacement.
Lesson Plan
Curated OER

Eating Patterns

For Teachers Pre-K - 2nd
Students sort through pictures of food to create patterns as they pertain to geometry. In this geometric patterns lesson, students relate to food as concrete objects that represent geometric patterns. Students recognize and...
Lesson Plan
West Contra Costa Unified School District

Finding the Equation of a Circle

For Teachers 9th - 12th Standards
Tired of going around and around for a resource on circles? Scholars determine the general equation of a circle on a coordinate plane, then participate in an activity matching equations to the radii and centers of the circles...

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