Lesson Plan
PBS

Pbs Mathline Lesson: Geometry, It's a Perfect Fit [Pdf]

For Teachers 3rd - 5th Standards
This two-part geometry lesson plan has students identify, describe, and classify two-dimensional shapes. Students engage in hands-on activities including identifying shapes in the classroom, creating patterns with shapes, identifying...
Activity
NumberNut

Number Nut: Shapes, Symbols, and Colors: 2 D Shapes

For Students K - 1st Standards
Did you know that two-dimensional shapes are also called polygons? This lesson describes the various 2-D shapes and includes two interactive games to reinforce skills.
Whiteboard
ClassFlow

Class Flow: Two Dimensional Shapes Identify and Match

For Teachers Pre-K - 1st Standards
[Free Registration/Login Required] This flipchart helps students to analyze and compare various two-dimensional shapes according to the vertices, sides and parallel lines. It features "containers" created in Version 3 (can be used with...
Activity
George Mason University

Area Formula Lab

For Teachers 4th - 8th Standards
In this set of worksheet activities, students will be guided to discover formulas for area of polygonal shapes and circles.
Lesson Plan
National Council of Teachers of Mathematics

The Math Forum: Suzanne Alejandre: Factor Lesson

For Teachers 9th - 10th Standards
Students will discover factoring through the area of a rectangle.
Activity
Rice University

Rice University: Cynthia Lanius: No Matter What Shape Your Fractions Are In

For Teachers K - 1st Standards
Four basic geometric shapes - the triangle, parallelogram, trapezoid, and hexagon - are examined to determine how many of one shape fits "inside" another. For instance, how many triangles are "in" a hexagon. Ten questions with solutions...
PPT
Sophia Learning

Sophia: Two Lines Tangent to a Circle: Lesson 3

For Students 9th - 10th
This lesson will present how if two segments from the same point outside a circle are tangent to a circle, then they are congruent. It is 3 of 5 in the series titled "Two Lines Tangent to a Circle."
PPT
Sophia Learning

Sophia: Using Triangles to Examine Quadrilaterals: Lesson 5

For Students 9th - 10th
This lesson demonstrates how to determine properties of quadrilaterals by using triangles. It is 5 of 5 in the series titled "Using Triangles to Examine Quadrilaterals."
PPT
Sophia Learning

Sophia: Using Triangles to Find the Sum of Interior Angles: Lesson 1

For Students 9th - 10th
This lesson demonstrates how to use triangles to determine the sum of the interior angles of a polygon. It is 1 of 5 in the series titled "Using Triangles to Find the Sum of Interior Angles."
Whiteboard
ClassFlow

Class Flow: Geometry 2 D Shapes

For Teachers 6th - 8th Standards
[Free Registration/Login Required] This flipchart introduces basic geometric shapes and gives students practice finding geometric shapes in everyday objects.
Whiteboard
SMART Technologies

Smart: Polygons

For Teachers 3rd - 5th
This SMART Notebook lesson allows students to characteristics of polygons by exploring vocabulary and sample problems.
Whiteboard
SMART Technologies

Smart: Shape Attributes

For Teachers Pre-K - 1st Standards
The introductory pages introduce the shapes and their attributes: triangle, rectangle, square, rhombus, circle, and oval. The additional pages allow students to practice shape recognition, tracing shapes, and drawing shapes.
Lesson Plan
Alabama Learning Exchange

Alex: Quadrilaterals

For Teachers 9th - 10th
This is an inquiry activity used to review Algebra 1 objectives by applying them to geometry concepts. Students explore the properties of quadrilaterals and classify them by definition. This activity can be use in geometry classes....
Article
Mocomi & Anibrain Digital Technologies

Mocomi: What Is Circle?

For Students 2nd - 8th
Discusses the radius, diameter, circumference, and area of a circle.
Article
Mocomi & Anibrain Digital Technologies

Mocomi: What Is a Polygon?

For Students 2nd - 8th
Defines polygons and explores characteristics, types of polygons, and how to calculate the area of a polygon.
Graphic
Mocomi & Anibrain Digital Technologies

Mocomi: What Are Triangles?

For Students 3rd - 8th
Learn all about triangles with the help of this downloadable mathematics worksheet.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Transformation Classification

For Students 7th
[Free Registration/Login may be required to access all resource tools.] Identify and describe transformations in the coordinate plane.
Unit Plan
Texas Education Agency

Texas Gateway: Describing and Drawing Cross Sections

For Students 9th - 10th
Given a verbal and/or pictorial description of the intersection of a plane with various three-dimensional geometric figures, the student will describe and/or draw the intersection.
Unit Plan
Khan Academy

Khan Academy: Cross Sections of 3 D Objects (Basic)

For Students 6th - 8th Standards
Match 3D objects with their 2D cross-sections. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unknown Type
Khan Academy

Khan Academy: Cross Sections of 3 D Objects (Basic)

For Students 7th Standards
Basic practice problems involving cross sections of 3D objects.
Unknown Type
Khan Academy

Khan Academy: Determine Rotations

For Students 9th - 10th
Given a figure on the coordinate plane and a center of a rotation, find the angle for the rotation that maps one figure to the other.
Unknown Type
Khan Academy

Khan Academy: Determine Reflections (Advanced)

For Students 9th - 10th
Given two figures on the coordinate plane, draw the line of reflection that takes one figure to another.
Activity
University of Georgia

University of Georgia: Transformations: Revisiting Congruence

For Students 9th - 10th Standards
This site presents information on the three basic transformations of figures in a plane: Reflections, Rotations, and Translations.
Activity
Rice University

Rice University: Cynthia Lanius: Polyominoes Fun With Dominoes

For Teachers 9th - 10th
For students who have ever played dominoes and Tetris, polyominoes will strike them as a great deal of fun. Teachers will see the educational benefits of working with similar and congruent shapes and rotating them in a plane. Exploration...

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