Properties of triangles

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Across
  1. 3. Points that lie outside the triangle are called the ________ of a triangle
  2. 5. What is the straight line that joins a vertex of a triangle with a point on the side opposite to it and is perpendicular to that side called?
  3. 6. When 3 numbers are such that the square of the largest number is equal to the sum of the square of the other 2 numbers all 3 numbers are known as pythagorean _______
  4. 8. _________ theorem states the square of the length of a hypotenuse is equal to the sum of the lengths of the other 2 sides in a right angled triangle
  5. 10. What is the straight line that joins a vertex of a triangle with the mid point of the side opposite to it called?
  6. 11. A side of a triangle that is usually at the bottom
Down
  1. 1. The ________ of a triangle means all the points that lie inside the triangle
  2. 2. One of the sides that contain a 90 degree angle in a right angled triangle
  3. 4. The side opposite the 90 degree angle of a right angled triangle is called ________
  4. 7. The ________ of a triangle means all the points lying on the sides of the triangle
  5. 9. A ________ is a closed figure made of three line segments