Handout
CK-12 Foundation

Ck 12: Geometry: Ratios and Proportions Study Guide

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This study guide reviews ratios, proportions, and cross-multiplication.
Lesson Plan
Better Lesson

Better Lesson: Architecture With Shapes

For Teachers 3rd
Determining the differences between similar shapes in geometry is more meaningful when the students create architectural structures using the different shapes.
Activity
Math Is Fun

Math Is Fun: Similar

For Students 3rd - 8th Standards
Students investigate when two shapes are similar. Definitions and examples are included.
Handout
CK-12 Foundation

Ck 12: Geometry: Perimeter and Area Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This study guide looks at the definitions and units for perimeter, area, and circumference, and at the perimeter and area of different shapes, including regular...
Interactive
Mangahigh

Mangahigh: Shape: Recognize Congruent Shapes

For Students 9th - 10th Standards
Determine whether shapes are congruent or similar.
Unit Plan
Texas Education Agency

Texas Gateway: Writing Geometric Relationships

For Students 7th - 9th Standards
Given information in a geometric context, students will be able to use informal arguments to establish facts about the angle sum and exterior angle of triangles, the angles created when parallel lines are cut by a transversal, and the...
Activity
CK-12 Foundation

Ck 12: Indirect Measurement

For Students 6th - 8th
[Free Registration/Login Required] Students use similar triangles to determine the height of the base of a tree house. Click learn more to watch a video and click challenge me to answer a practice question.
Lesson Plan
Alabama Learning Exchange

Alex: How Tall Is the School's Flagpole?

For Teachers 9th - 10th Standards
The purpose of this lesson is to help students apply math concepts concerning similar triangles and trigonometric functions to real life situations. The students learn how to take these concepts and use them to find measurements of...
Unknown Type
Khan Academy

Khan Academy: Congruence and Transformations

For Students 9th - 10th Standards
Given a pair of figures in the coordinate plane, try to map one onto the other and determine whether they are congruent. Includes examples of glide reflections. Students receive immediate feedback and have the opportunity to try...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Forms of Ratios

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find and reduce ratios. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Proportion Properties

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Apply proportion properties.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Proportion Properties

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to set up and solve proportions.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Forms of Ratios

For Students 6th - 9th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students what a ratio is and how to use one. Students examine guided notes, review guided practice, watch instructional videos and attempt...
Unit Plan
Sophia Learning

Sophia: Prisms and Cylinders Tutorial

For Students 6th - 8th
Compare a prism and a cylinder in order to determine the similarities of calculating the volume.
Interactive
Mangahigh

Mangahigh: Shape: Length, Area and Volume Scale Factors

For Students 9th - 10th Standards
Explore the relationships between area and volume based upon length.
Activity
Hunkins Experiments

Hunkin's Experiments:how to Measure the Height of a Tree

For Students 3rd - 8th
Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do. This part...