Math proof crossword

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Across
  1. 2. How many steps must you use to prove that a triangle is a right triangle?
  2. 4. The bisector of the vertex angle of an Isosceles triangle is the _____ bisector of the base.
  3. 9. If 2 angles in a triangle are congruent to the 2 corresponding angles in another triangle, then they are__________.
  4. 10. The _____ of an isosceles triangle form 2 congruent angles.
  5. 11. The reason you can start any proof with.
  6. 12. What Theorem would you use if you had a right angle, a leg, and a hypotenuse?
  7. 13. What acronym tells us that coresponding sides are congruent?
Down
  1. 1. A statement that follows imediately after the theorem is a _____.
  2. 3. What is the longest side of a right triangle called?
  3. 5. The base of an isosceles triangle forms a 3rd __________ side.
  4. 6. If two sides of a triangle are congruent, then the angles _____ are congruent.
  5. 7. What acronym tells us that angles vertical each other are congruent?
  6. 8. What property is it when the lines or angles go the same way? ( <ABC=<DEF )