Triangle and its properties

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Across
  1. 2. : property used to decide the given triangle is right angled or not.
  2. 4. : angles opposite to equal sides are equal in a __________ triangle
  3. 6. : perpendicular line segment from vertex to the opposite side.
  4. 7. degree : angle of equlateral triangle
  5. 9. : to form a triangle sum of lengths two sides of a triangle should be always _______ than the third side.
Down
  1. 1. : longest side of the right angled triangle
  2. 3. eighty degree : total measure of three angles of a triangle is
  3. 5. angle : sum of two opposite interior angle
  4. 8. : line segment which connects vertex to the midpoint of the opposite side