The Pythagorean Theorem

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Across
  1. 2. An angle of 90 degrees is a ________ angle
  2. 4. Pythagoras was a Greek ___________
  3. 5. A group of three related objects is called a ________
  4. 7. A shape with three angles and three sides
  5. 10. The reverse statement is also called a __________
  6. 11. A square root (or other type of root) whose exact decimal value cannot be found
  7. 12. It looks like a rectangle, but the sides are equally long
  8. 13. A triangle has three angles and three ___________
Down
  1. 1. When we have the same number___________ by itself the result is a square number
  2. 3. The longest side of a right-angled triangle is called a __________
  3. 6. a^2 + b^2 = c^2 is the formula for the Pythagorean ____________
  4. 8. When solving an equation, we use the ___________ operation
  5. 9. A surd that cannot be written as a fraction is also called an __________ number