Triangle and its properties

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