Math Crossword Puzzle

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Across
  1. 4. 2 triangles in which all corresponding angles are congruent and all corresponding sides are proportional
  2. 7. distance around a figure
  3. 8. 2 geometric figures that have the same shape and size
  4. 12. a triangle that contains a right angle
  5. 14. the sum of the angles of a triangle is 180 degrees
  6. 17. space inside a figure
  7. 18. an less than 90 degrees
  8. 19. and angle whose measure is 90 degrees
  9. 20. 2 lies on the same plane which never intersect
Down
  1. 1. a geometric figure is congruent to itself
  2. 2. 2 lines that intersect to form a right triangle
  3. 3. the 2 sides of a right triangle which form 90 degree angle
  4. 5. in a triangle the segment joining the midpoints of 2 sides
  5. 6. an idea that we accept to be true
  6. 9. angles whose measures are equal
  7. 10. an idea that we can prove to be true
  8. 11. square of the hypotenuse is equal to the sum of the squares of the other 2 legs
  9. 13. triangle with 2 congruent sides and angles
  10. 15. longest side of a right triangle
  11. 16. point that divides a segment into 2 congruent segments