8.G.B.6: Explain a proof of the Pythagorean Theorem and its converse.
8.G.B.7: Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in real-world and mathematical problems in two and three dimensions.*
8.G.B.8: Apply the Pythagorean Theorem to find the distance between two points in a coordinate system.*
3. Khan Academy: