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In this unit, students learn to find areas of polygons by decomposing, rearranging, and composing shapes. They learn to understand and use the terms “base” and “height,” and find areas of parallelograms and triangles. Students approximate areas of non-polygonal regions by polygonal regions. They represent polyhedra with nets and find their surface areas.

Subject:
Geometry
Mathematics
Material Type:
Unit of Study
Provider:
Illustrative Mathematics
11/17/2020
Unrestricted Use
CC BY
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This task examines the ways in which the plane can be covered by regular polygons in a very strict arrangement called a regular tessellation. These tessellations are studied here using algebra, which enters the picture via the formula for the measure of the interior angles of a regular polygon (which should therefore be introduced or reviewed before beginning the task). The goal of the task is to use algebra in order to understand which tessellations of the plane with regular polygons are possible.

Subject:
Algebra
Geometry
Mathematics
Material Type:
Activity/Lab
Provider:
Illustrative Mathematics
Provider Set:
Illustrative Mathematics
Author:
Illustrative Mathematics
01/21/2013
Educational Use
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In this video tutorial lesson, determine the area of a parallelogram using triangles and rectangles then assess learning with a quiz. [3:34]

Subject:
Mathematics
Material Type:
Audio/Video
Provider:
Sophia Learning
12/01/2023
Educational Use
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In this video, students will determine the area of a trapezoid and assess learning with a quiz. [4:24]

Subject:
Mathematics
Material Type:
Audio/Video
Provider:
Sophia Learning
12/01/2023
Educational Use
Rating
0.0 stars

This video tutorial shares several examples of different types of triangles as they are used to determine the area of each triangle. Assessment checks understanding. [6:54]

Subject:
Mathematics
Material Type:
Audio/Video
Provider:
Sophia Learning
12/01/2023
Educational Use
Rating
0.0 stars

Students apply what they know about area of other polygons to develop a formula for finding the area of a triangle.

Subject:
Mathematics
Material Type:
Lesson Plan
Provider:
BetterLesson
12/01/2022
Educational Use
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0.0 stars

Online drawing programs allow students to explore many possibilities with polygons!

Subject:
Mathematics
Material Type:
Lesson Plan
Provider:
BetterLesson
12/01/2022
Educational Use
Rating
0.0 stars

Interacting with polygons and testing the definitions can be engaging, fun and build a powerful, individualized understanding.

Subject:
Mathematics
Material Type:
Lesson Plan
Provider:
BetterLesson
12/01/2022
Educational Use
Rating
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Connecting the dots between Geometry and the Coordinate Grid.

Subject:
Mathematics
Material Type:
Lesson Plan
Provider:
BetterLesson
12/01/2022
Educational Use
Rating
0.0 stars

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.

Subject:
Mathematics
Material Type:
Game
12/01/2023
Conditional Remix & Share Permitted
CC BY-NC-SA
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This book is a "flexed" version of CK-12's Basic Geometry that aligns with College Access Geometry and contains embedded literacy supports. It covers the essentials of geometry for the high school student.

Subject:
Geometry
Mathematics
Material Type:
Textbook
Provider:
CK-12 Foundation
Provider Set:
CK-12 FlexBook
Author:
Fauteux, Michael
Zapata, Rosamaria
05/18/2011
Conditional Remix & Share Permitted
CC BY-NC-SA
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0.0 stars

CK-12 Foundation's Geometry FlexBook is a clear presentation of the essentials of geometry for the high school student. Topics include: Proof, Congruent Triangles, Quadrilaterals, Similarity, Perimeter & Area, Volume, and Transformations.

Subject:
Geometry
Mathematics
Material Type:
Textbook
Provider:
CK-12 Foundation
Provider Set:
CK-12 FlexBook
10/06/2009
Educational Use
Rating
0.0 stars

In this video segment from Cyberchase, the CyberSquad measures Judge Trudy's land claim by using tarps, fence posts and a grid made with rope.

Subject:
Mathematics
Material Type:
Lecture
Provider:
PBS LearningMedia
Author:
U.S. Department of Education
WNET
07/07/2008
Educational Use
Rating
0.0 stars

Use different size triangle to determine how to solve for the area in this video lesson. Take quiz to check understanding. [3:41]

Subject:
Mathematics
Material Type:
Audio/Video
Provider:
Sophia Learning
12/01/2023
Educational Use
Rating
0.0 stars

This interactive diagram focuses on sorting polygons by common properties and then you select the correct label for each section of the Venn Diagram.

Subject:
Mathematics
Material Type:
Interactive
Provider:
PBS LearningMedia
11/06/2023
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

Demonstrates how to decide which quadrilaterals match a set of given properties. [2:28]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Subject:
Mathematics
Material Type:
Audio/Video
Lesson
Provider:
11/14/2023
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

Explains how to classify 2D shapes based on the properties of their sides and angles. [2:15]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Subject:
Mathematics
Material Type:
Audio/Video
Lesson
Provider:
11/14/2023
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

Demonstrates how to find what 2D shape matches a set of properties. [3:37]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Subject:
Mathematics
Material Type:
Audio/Video
Lesson
Provider:
11/14/2023
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
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Discusses the different types of triangles and their angles. [6:00]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Subject:
Mathematics
Material Type:
Audio/Video
Lesson
Provider: