Triangles

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Across
  1. 3. a triangle where all the sides are equal
  2. 6. a triangle with one obtuse angle.
  3. 7. a triangle in which all the sides are unequal in size.
  4. 9. triangle a triangle with one angle equal to 90.
  5. 13. a triangle in which 2 out of the 3 sides are equal.
Down
  1. 1. a three sided polygon.
  2. 2. you can use this theorom to find the size of the hypotenuse in a right angled triangle.
  3. 4. A rule used to prove congruency by proving that the hypotenuse and any one side are equal in a right angled triangle.
  4. 5. A rule used to prove congruency by proving that two angles and the included side are equal of two triangles.
  5. 8. A rule used to prove congruency by proving that any two sides and the included angle is equal.
  6. 10. You can use my formula to find the area of a triangle considering you are given the perimeter.
  7. 11. a three dimensional triangle.
  8. 12. when two triangles are exactly the same in terms of area,angles and sides.
  9. 14. A rule used to prove congruency by proving that all three sides are equal in both triangles.