cross word puzzle

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Across
  1. 6. When the sum of the measure of two angles is 180⁰ then the angles are called_______
  2. 9. Three sided closed figure is known as_____,
  3. 10. The surface covered in a plane is____,
  4. 11. The perpendicular line from the vertex to the base is known as_____,
  5. 12. 4 X side is the formula to find the perimeter of________,
  6. 13. One of the angle in a right angle triangle is____,
Down
  1. 1. In _______triangle all sides are equal
  2. 2. Four sided closed figure is known as_____,
  3. 3. If two sides are equal in a triangle then it is called as______triangle
  4. 4. Sum of length of all sides in a closed figure is known as____,
  5. 5. When the sum of the measure of two angles is 90⁰ then the angles are called_______,
  6. 7. Corresponding angles are always
  7. 8. length X breadth is the formula to find the area of ___,