Lesson Plan
Curated OER

Finding the Area of an Equilateral Triangle

For Teachers 9th - 11th Standards
The problem seems simple: find the area of the equilateral triangle whose sides are each length 1. In fact, this same problem is solved in 8th grade, addressing a different Common Core standard, using the formula for area of a triangle...
Lesson Plan
Curated OER

Global Positioning System I

For Teachers 9th - 12th Standards
Geometry learners touch the surface of how a global positioning system works. The end goal is to find the intersections of three different spheres geometrically and algebraically given their algebraic representations.
Lesson Plan
Government of Hong Kong

Areas and Volumes - 2D Shapes

For Teachers 3rd - 6th Standards
Unfortunately for young mathematicians, the world isn't made entirely of parallelograms, triangles, and trapezoids. After first learning the area formulas for these common shapes, students apply this new knowledge to...
Lesson Plan
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Illustrative Mathematics

Equal Area Triangles on the Same Base II

For Teachers 9th - 12th Standards
A deceptively simple question setup leads to a number of attack methods and a surprisingly sophisticated solution set in this open-ended problem. Young geometers of different strengths can go about defining the solutions graphically,...
Activity
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Math Games for Skills and Concepts

For Teachers 2nd - 5th
A 27-page packet full of math games and activities builds on algebra, measurement, geometry, fractional, and graphing skills. Young mathematicians participate in math games collaboratively, promoting teamwork and skills practice.
Worksheet
Curated OER

Geometry

For Students 4th - 5th
In this geometry learning exercise, students utilize mathematical strategies to figure out which of four lines are vertical, horizontal and/or parallel.
Worksheet
Curated OER

Geometry - Congruent Figures

For Students 1st - 3rd
In this geometry worksheet, students see two congruent figures. They match the corresponding parts by writing their labels in the 3 boxes at the bottom of the page.
Lesson Plan
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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...
Lesson Plan
Curated OER

Applications of Properties of Quadrilaterals in the Coordinate Plane

For Teachers 9th - 12th
High schoolers explore the concept of quadrilaterals. In this quadrilaterals lesson, students use the slope formula, midpoint formula, and distance formula to justify that a given quadrilateral is a parallelogram.
Lesson Plan
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Geo Jammin' By DeSign - Day 1, Lesson 2: Dancing Duo

For Teachers 2nd
Second graders and teachers identify geometric vocabulary word by searching a geometry website. They create a Quilt Word Wall using the geometry words.
Worksheet
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Perimeter – Calculate in Units

For Students 5th - 7th
In this geometry skills practice worksheet, students solve 4 problems that require them calculate the perimeter of 4 geometric figures.
Lesson Plan
Curated OER

Geometric Shapes at the OK Corral

For Teachers K
Students explore geometry by utilizing computer software. In this shape identification lesson, students define several geometric shapes by the characteristics that classify them. Students draw and cut out geometric shapes using their...
Lesson Plan
Curated OER

Triangles Introduction

For Teachers K - 3rd
Students explore geometry by drawing various shapes in class. In this triangle characteristics lesson, students identify the attributes that classify a shape as a triangle and practice using their bodies to create triangles in class....
Lesson Plan
Curated OER

It's a Ball, It's a Sphere ... No, It's a Dodecahedron

For Teachers 3rd
Third graders construct a dodecahedron that displays facts about two and three-dimensional figures. They use a pattern to construct a dodecahedron after writing facts about geometry onto each of the figure's twelve faces.
Worksheet
Curated OER

Plotting Coordinates

For Students 5th - 7th
In this geometry skills worksheet, students plot the listed coordinates on the provided graphs in order to identify the appropriate shapes.
Worksheet
Curated OER

Area – Parallelograms and Trapezoids

For Students 7th - 9th
In this geometry skills worksheet, students solve 4 problems that require them to calculate the area of parallelograms and trapezoids.
Worksheet
Curated OER

Parts of the Circle

For Students 6th - 8th
In this geometry skills worksheet, middle schoolers respond to 3 questions that require them to examine the part of circles and identify them as diameters, chords, radii, or centers.
Worksheet
Curated OER

Parts of the Circle

For Students 5th - 7th
In this geometry skills worksheet, students examine 3 labeled circles and identify the noted items as diameters, chords, radii, or centers.
Worksheet
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Match the Shape

For Students K - 2nd
In this geometry skills practice instructional activity, students respond to 4 questions that require them to match everyday items as the geometric shapes they represent.
Worksheet
Curated OER

Regular or Irregular Polygons

For Students 6th - 8th
In this geometry skills learning exercise, students respond to 6 questions that require determine whether 6 geometric shapes are regular or irregular polygons.
Worksheet
Curated OER

Side Lengths of Similar Shapes

For Students 7th - 10th
In this geometry skills learning exercise, students examine 4 pairs of similar shapes and use their problem solving skills and the information provided to calculate the length of segments.
Worksheet
Curated OER

Calculate the Area of Compound Figures

For Students 6th - 8th
For this geometry skills worksheet, students respond to 4 questions that require them to calculate the area of compound figures.
Worksheet
Curated OER

Calculate Perimeter

For Students 5th - 8th
For this geometry skills worksheet, students solve 8 problems that require them to calculate the perimeter of 8 geometric shapes. Students show their work in the space provided.
Worksheet
Curated OER

Calculate Volume

For Students 6th - 8th
In this geometry skills worksheet, learners examine 3 figures and the information regarding them in order to calculate the volume of each of them.

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