Updating search results...

# 66 Results

View
Selected filters:
• triangles
Unrestricted Use
CC BY
Rating
0.0 stars

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
05/11/2020
Only Sharing Permitted
CC BY-NC-ND
Rating
0.0 stars

This lesson unit is intended to help teachers assess how well students are able to: work with concepts of congruency and similarity, including identifying corresponding sides and corresponding angles within and between triangles; Identify and understand the significance of a counter-example; Prove, and evaluate proofs in a geometric context.

Subject:
Geometry
Mathematics
Material Type:
Assessment
Lesson Plan
Provider:
Shell Center for Mathematical Education
Provider Set:
Mathematics Assessment Project (MAP)
04/26/2013
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

This learning video deals with a question of geometrical probability. A key idea presented is the fact that a linear equation in three dimensions produces a plane. The video focuses on random triangles that are defined by their three respective angles. These angles are chosen randomly subject to a constraint that they must sum to 180 degrees. An example of the types of in-class activities for between segments of the video is: Ask six students for numbers and make those numbers the coordinates x,y of three points. Then have the class try to figure out how to decide if the triangle with those corners is acute or obtuse.

Subject:
Geometry
Mathematics
Statistics and Probability
Material Type:
Lecture
Provider:
MIT
Provider Set:
MIT Blossoms
Author:
Gilbert Strange
06/02/2012
Unrestricted Use
CC BY
Rating
0.0 stars

The purpose of this task is primarily assessment-oriented, asking students to demonstrate knowledge of how to determine the congruency of triangles.

Subject:
Geometry
Mathematics
Material Type:
Activity/Lab
Provider:
Illustrative Mathematics
Provider Set:
Illustrative Mathematics
Author:
Illustrative Mathematics
05/01/2012
Unrestricted Use
CC BY
Rating
0.0 stars

The purpose of this task is to help students understand what is meant by a base and its corresponding height in a triangle and to be able to correctly identify all three base-height pairs.

Subject:
Geometry
Mathematics
Material Type:
Activity/Lab
Provider:
Illustrative Mathematics
Provider Set:
Illustrative Mathematics
Author:
Illustrative Mathematics
05/01/2012
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

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
Rating
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
Unrestricted Use
CC BY
Rating
0.0 stars

This task shows that the three perpendicular bisectors of the sides of a triangle all meet in a point, using the characterization of the perpendicular bisector of a line segment as the set of points equidistant from the two ends of the segment. The point so constructed is called the circumcenter of the triangle.

Subject:
Geometry
Mathematics
Material Type:
Activity/Lab
Provider:
Illustrative Mathematics
Provider Set:
Illustrative Mathematics
Author:
Illustrative Mathematics
03/04/2013
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

This short video and interactive assessment activity is designed to teach fourth graders about classifying triangles based on equal sides.

Subject:
Geometry
Mathematics
Material Type:
Assessment
Interactive
Lecture
Provider:
CK-12 Foundation
Provider Set:
CK-12 Elementary Math
03/05/2015
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

Students explore how the formulas for the areas of parallelograms, triangles, and trapezoids are developed.

Subject:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Author:
Heather Bolles
05/13/2020
Conditional Remix & Share Permitted
CC BY-SA
Rating
0.0 stars

This book is designed for a semester-long course in Foundations of Geometry and meant to be rigorous, conservative, elementary and minimalistic.

Subject:
Geometry
Mathematics
Material Type:
Textbook
Author:
Anton Petrunin
08/13/2018
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

This is a 10 slide Soft Chalk presentation that includes:
Classify Triangle by Angles
Classify Triangles by Sides
Triangle Sum Theorem
Isosceles Triangles Theorem
Pythagorean Theorem
Tan Ratio

Subject:
Geometry
Mathematics
Material Type:
Unit of Study
Author:
Kimberley Mounts
03/08/2021
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

A structured geometry program teacher edition of daily lesson plans and teacher supports to accompany the College Access Reader: Geometry student edition.

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
Rating
0.0 stars

Students engage in a competitive group relay to construct formal proofs involving triangles.

New proofs can always be written to fit different curriculum and pacing.

Subject:
Mathematics
Material Type:
Activity/Lab
Assessment
Game
10/18/2018
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

Students engage in a competitive group relay to construct formal proofs involving triangles.

New proofs can always be written to fit different curriculum and pacing.

Subject:
Mathematics
Material Type:
Activity/Lab
Assessment
Game
10/21/2018
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

Students engage in a competitive group relay to construct formal proofs involving triangles.

New proofs can always be written to fit different curriculum and pacing.

Subject:
Mathematics
Material Type:
Activity/Lab
Assessment
Game
02/12/2016
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
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
11/23/2010
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

Just as rigid motions are used to define congruence in Module 1, so dilations are added to define similarity in Module 2.  To be able to discuss similarity, students must first have a clear understanding of how dilations behave.  This is done in two parts, by studying how dilations yield scale drawings and reasoning why the properties of dilations must be true. Once dilations are clearly established, similarity transformations are defined and length and angle relationships are examined, yielding triangle similarity criteria.  An in-depth look at similarity within right triangles follows, and finally the module ends with a study of right triangle trigonometry.

Find the rest of the EngageNY Mathematics resources at https://archive.org/details/engageny-mathematics.

Subject:
Geometry
Mathematics
Material Type:
Module
Provider:
New York State Education Department
Provider Set:
EngageNY