Lesson Plan

#### Description:

Students use the Pythagorean theorem to solve a tricky puzzle involving a square with four isosceles triangles cut from the corners.

#### Subjects:

• Mathematics > General
• Mathematics > Geometry
• Mathematics > Problem Solving

#### Keywords:

geometry measurement coordinate conjecture pythagorean theorum triangle triangles

English

#### Access Privileges:

Public - Available to anyone

#### Collections:

Geometry
Update Standards?

#### CCSS.Math.Content.HSF-TF.C.8: Common Core State Standards for Mathematics

Prove the Pythagorean identity sin²(?) + cos²(?) = 1 and use it to find sin(?), cos(?), or tan(?) given sin(?), cos(?), or tan(?) and the quadrant of the angle.

#### CCSS.Math.Content.HSG-SRT.C.8: Common Core State Standards for Mathematics

Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.?

#### S2487000: Texas Essential Knowledge and Skills for Mathematics

use models and diagrams to explain the Pythagorean theorem.
Curriki Rating
On a scale of 0 to 3
3
On a scale of 0 to 3

This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of 2009-07-26.

#### Component Ratings:

Technical Completeness: 3
Content Accuracy: 3
Appropriate Pedagogy: 2