G-SRT.B. Prove theorems involving similarity

G-SRT.B.4. Prove theorems about triangles. Theorems include: a line parallel to one side of a triangle divides the other two proportionally, and conversely; the Pythagorean Theorem proved using triangle similarity.

• Joining two midpoints of sides of a triangle
• Pythagorean Theorem

G-SRT.B.5. Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

• Bank Shot
• Congruence of parallelograms
• Extensions, Bisections and Dissections in a Rectangle
• Finding triangle coordinates
• Folding a square into thirds
• How far is the horizon?
• Is this a rectangle?
• Points from Directions
• Slope Criterion for Perpendicular Lines
• Tangent Line to Two Circles
• Unit Squares and Triangles