Unit Plan
Texas Education Agency

Texas Gateway: Generalizing Geometric Properties of Ratios in Similar Figures

For Students 9th - 10th Standards
Students will investigate patterns to make conjectures about geometric relationships and apply the definition of similarity, in terms of a dilation, to identify similar figures and their proportional sides and congruent corresponding...
Website
University of Regina (Canada)

University of Regina: Math Central: Lesson: Mr. Z's 5 Minute Game of Geometric Pandemonium

For Teachers 3rd - 5th Standards
Students make a series of geometric drawings of points, obtuse angles, rays, polygons, and the like. Each child is given one but not allowed to show anyone else. The drawing is then taped to the back of the child in front of them. The...
Unit Plan
Sophia Learning

Sophia: Translations of Geometric Figures: Lesson 1

For Students 9th - 10th
This lesson will present how to translate a geometric figure on a coordinate plane, and will discuss how the properties of the figure are affected. It is 1 of 5 in the series titled "Translations of Geometric Figures."
PPT
Sophia Learning

Sophia: Translations of Geometric Figures: Lesson 3

For Students 9th - 10th
This lesson will present how to translate a geometric figure on a coordinate plane, and will discuss how the properties of the figure are affected. It is 3 of 5 in the series titled "Translations of Geometric Figures."
Activity
National Council of Teachers of Mathematics

Nctm: Figure This: Fire Hydrant

For Students 3rd - 8th Standards
Discover how the geometric shape of an object directly relates to its usefullness in this math challenge from the NCTM Math Challenges for Families collection. A one page activity that you can print or download.
Interactive
ABCya

Ab Cya: Shapes: Geometry Game

For Students Pre-K - 1st Standards
Shapes is a fun educational activity to help children learn basic properties of simple geometric figures. Children will practice looking for differences and similarities between shapes to complete puzzles. Shapes! gets progressively more...
Interactive
Quia

Quia: Geometric Terms Matching

For Students 3rd - 8th Standards
Do you need practice remembering or learning different geometry vocabulary words and definitions? This matching game is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are...
Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Geometric Solids

For Students Pre-K - 1st Standards
This tool allows you to manipulate various geometric solids and investigate their properties.
Activity
University of Cambridge

University of Cambridge: Nrich: Where Are They?

For Students 3rd - 8th
Test your logic, polygon properties, and pattern recognition skills working on this challenge. Solution included.
Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Geometric Solids

For Students 9th - 10th Standards
The instructional tool explores various geometric solids and their properties. Student can manipulate and color the different shapes. Learners examine the edges, faces, and vertices of the different solid figures.
Lesson Plan
Texas Instruments

Texas Instruments: Parallelograms: Discovering Their Properties

For Teachers 9th - 10th Standards
Students use the TI-89 with CABRI Geometry to discover properties of parallelograms. They will construct a figure and use the definition to discover the figure is a parallelogram.
Activity
National Council of Teachers of Mathematics

Nctm: Illuminations: Cutting Corners

For Students 9th - 10th Standards
Students will use their knowledge of plane figure attributes to create and view shapes by cutting and rotating shapes to stimulate discussions on names and attributes of various shapes they do not regularly encounter.
Activity
National Council of Teachers of Mathematics

Nctm: Figure This: Cut the Cake

For Students 2nd - 6th Standards
A math challenge where geometry, measurement, and problem solving meet. Explore the properties of three dimensional shapes when you discover how six friends can equally divide a nine inch square chocolate cake. A one page activity from...
Interactive
Quia

Quia: Geometric Terms Flash Cards

For Students 2nd - 8th Standards
Do you need practice remembering or learning different geometry vocabulary words and definitions? The flash cards at this web site are for you! There is a link to a list of terms with definitions you can click if you want to see if you...
Interactive
Quia

Quia: Geometric Terms Word Search

For Students 3rd - 8th
Do you need practice remembering or learning different geometry vocabulary words and definitions? This word search is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are...
Activity
Texas Instruments

Texas Instruments: Rotations in the Plane Cabri Jr: Interactive

For Teachers 9th - 10th Standards
In this activity, you will explore the invariant properties of rotations and the results of rotations in the coordinate plane.
Handout
Cuemath

Cuemath: What Is Congruence?

For Students 9th - 10th Standards
Explore the world of congruence in this mini-lesson. Provides a definition and examples that help with understanding its properties.
Whiteboard
ClassFlow

Class Flow: Similar Shapes

For Teachers 9th - 10th Standards
[Free Registration/Login Required] In this flipchart, students use the drawing and interactive tools in Activstudio to apply geometric properties and relationships to describe, compare, and draw two-dimensional shapes and figures.
Interactive
Other

Bright Productions Web Designs: Shape Game

For Students Pre-K - 1st Standards
You will enjoy this shape game. It tells you the name of a shape and all you have to do is click on the correct shape. If you get confused you can have another try.
Interactive
Quia

Quia: Geometric Terms Concentration

For Students 3rd - 8th
Do you need practice remembering or learning different geometry vocabulary words and definitions? This concentration game is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if...
Unknown Type
Khan Academy

Khan Academy: Practice: Classify Shapes by Line and Angle Types

For Students 4th
Look at the properties of 2D shapes to see which shapes can belong to the same group. Includes hints.
Handout
Khan Academy

Khan Academy: Quadrilaterals Review

For Students 4th
After reviewing the properties of different quadrilaterals, students answer questions about each type.
Activity
University of Cambridge

University of Cambridge: Nrich: Count the Trapeziums (Trapezoids)

For Students 3rd - 4th Standards
The challenge at this one page website, is to see how many trapezoids (British-trapeziums) you can find in the figure. When you have your results, you can easily check it right at the website.
Activity
Annenberg Foundation

Annenberg Learner: Geometry 3 D Shapes

For Students 6th - 8th Standards
Learn about several three-dimensional geometric shapes and the terminology used to describe them. Learn how to calculate their surface area and volume, and explore their mathematical properties.