mathematics H.W

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Across
  1. 1. sum of any 2 angles fo a triangle is equal to _____ angle of the 3rd angle
  2. 3. a line segment that joins a vertex and the midpoint of the opposite side in a triangle.
  3. 5. a line segment that joins a vertex to the opposite side at an angle of 90°in a triangle.
  4. 7. sum of all the angles of a triangle.
  5. 8. ______ triangle has all angles equal.
  6. 10. 89 is a ______ angle.
Down
  1. 2. if a triangle has one of its angles greater than 90 but less than 180 is a/an ______ triangle.
  2. 4. measure of a right angle.
  3. 6. no. of (answer 3) in a triangle.
  4. 9. a shape with the least no. of straight lines.