8.G.8 – Apply the Pythagorean Theorem to find the distance between two points in a coordinate system.

Internet Resources (Videos, Websites, etc.)


  1. Fit by Design or Design to Fit

Khan Academy

  1. Distance formula

Learn Zillion

  1. Find the length of a diagonal by creating a square
  2. Find the perimeter of a two dimensional figure on the coordinate plane
  3. Find the length of a line segment on the coordinate plane using the Pythagorean Theorem
  4. Find the area of a two dimensional figure on the coordinate plane


  1. The Pythagorean Theorem
  2. A Geometric Proof of the Pythagorean Theorem

Mathematics Assessment Project (MAP)

  1. E04: Proofs Of The Pythagorean Theorem?
  2. E08: Pythagorean Triples
  3. E15: Circles and Squares
  4. A05: Hopewell Geometry

Online Practice from IXL

  1. Coordinate graphs: Distance between two points (Eighth grade – P.4)


  1. Pythagorean Theorem

Teach Engineering

  1. Classroom Triangles
  2. Stay in Shape
  3. Trig River

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