## Open Educational Resources

Displaying 1 of 4 results
Rating | Views Title Posted Date Contributor Common Core Standards Grade Levels Resource Type

This activity is from the 2011 CGCC Junior High Math Contest Team Project. You may pick and choose which parts of the project to use or use it all! Percent increase/decrease and Area of circles The Counting Principle Pythagorean Theorem and Ratios

7.RP.A.3 7.G.B.4 7.G.B.6 8.G.B.7 7.RP.A.2 MP.1 MP.2 MP.3 MP.4 MP.5 MP.6 MP.7 MP.8 7 8 Activity

#### Proving the Pythagorean Theorem with Geogebra

The Pythagorean theorem is one of the most important concepts in all of mathematics. This activity uses Geogebra to help students see why the relationship between the sides of a right triangle are as they are.

11/13/2014 Trey Cox
8.G.B.6 8.G.B.7 MP.1 MP.3 MP.4 MP.5 8 Activity

#### Pythagorean Theorem Investigation: It's As Easy As… a, b, c

Oftentimes, the Pythagorean Theorem is taught from the standpoint of, "Here is the formula, let's practice finding the lengths of the sides of triangles!" without helping students understand or develop the relationships between the sides on their own. This activity helps students experience those relationships using multiple approaches, prove why the theorem is true, and practice using it.

10/19/2014 Trey Cox
8.G.B.6 8.G.B.7 8.G.B.8 MP.1 MP.2 MP.3 MP.4 MP.7 8 Activity

#### Proportional Relationships of Triangles - An Activity

This is a two-part activity and will most likely take two 50 - 55 minute class periods – one day per part. Part I (Day one) is a hands-on activity that allows students to work together on computers to discover the proportional relationship between a pair of similar right triangles. Ideally, you will have a class set of computers or a computer lab you could use for this lesson. If you don't have access to these resources you can run a demonstration on one computer and project it for the class and have students come up to manipulate the triangles.

9/5/2014 Trey Cox
8.G.B.7 HSG-SRT.A.2 HSG-SRT.B.5 HSG-SRT.C.8 MP.1 MP.2 MP.3 MP.4 MP.5 MP.6 8 HS Activity