PBS
Pbs Mathline Lesson: Geometry, It's a Perfect Fit [Pdf]
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...
NumberNut
Number Nut: Shapes, Symbols, and Colors: 2 D Shapes
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.
ClassFlow
Class Flow: Two Dimensional Shapes Identify and Match
[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...
George Mason University
Area Formula Lab
In this set of worksheet activities, students will be guided to discover formulas for area of polygonal shapes and circles.
National Council of Teachers of Mathematics
The Math Forum: Suzanne Alejandre: Factor Lesson
Students will discover factoring through the area of a rectangle.
Rice University
Rice University: Cynthia Lanius: No Matter What Shape Your Fractions Are In
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...
Sophia Learning
Sophia: Two Lines Tangent to a Circle: Lesson 3
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."
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals: Lesson 5
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."
Sophia Learning
Sophia: Using Triangles to Find the Sum of Interior Angles: Lesson 1
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."
ClassFlow
Class Flow: Geometry 2 D Shapes
[Free Registration/Login Required] This flipchart introduces basic geometric shapes and gives students practice finding geometric shapes in everyday objects.
SMART Technologies
Smart: Polygons
This SMART Notebook lesson allows students to characteristics of polygons by exploring vocabulary and sample problems.
SMART Technologies
Smart: Shape Attributes
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.
Alabama Learning Exchange
Alex: Quadrilaterals
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....
Mocomi & Anibrain Digital Technologies
Mocomi: What Is Circle?
Discusses the radius, diameter, circumference, and area of a circle.
Mocomi & Anibrain Digital Technologies
Mocomi: What Is a Polygon?
Defines polygons and explores characteristics, types of polygons, and how to calculate the area of a polygon.
Mocomi & Anibrain Digital Technologies
Mocomi: What Are Triangles?
Learn all about triangles with the help of this downloadable mathematics worksheet.
CK-12 Foundation
Ck 12: Geometry: Transformation Classification
[Free Registration/Login may be required to access all resource tools.] Identify and describe transformations in the coordinate plane.
Texas Education Agency
Texas Gateway: Describing and Drawing Cross Sections
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.
Khan Academy
Khan Academy: Cross Sections of 3 D Objects (Basic)
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.
Khan Academy
Khan Academy: Cross Sections of 3 D Objects (Basic)
Basic practice problems involving cross sections of 3D objects.
Khan Academy
Khan Academy: Determine Rotations
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.
Khan Academy
Khan Academy: Determine Reflections (Advanced)
Given two figures on the coordinate plane, draw the line of reflection that takes one figure to another.
University of Georgia
University of Georgia: Transformations: Revisiting Congruence
This site presents information on the three basic transformations of figures in a plane: Reflections, Rotations, and Translations.
Rice University
Rice University: Cynthia Lanius: Polyominoes Fun With Dominoes
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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