Triangles

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Across
  1. 5. Sum of all sides
  2. 7. Perpendicular from vertex to base
  3. 8. Same shape different size
  4. 10. Triangle with all unequal sides
  5. 12. Right triangle theorem
  6. 13. Space between two rays
Down
  1. 1. Meeting point of sides
  2. 2. Same shape and same size
  3. 3. Longest side of right triangle
  4. 4. Line joining vertex to midpoint
  5. 6. Triangle with all equal sides
  6. 9. Triangle with two equal sides
  7. 11. Figure with three sides