1. By Azam Khan
7-B

2. The sum of the angles in a triangle is
always equal to 180.This property is
called the angle sum property of a
triangle.

4. Exterior angle is equal to the
sum of the opposite interior
angles.

6. The sum of any two sides
is always bigger than the
third side.

7. 21
47+21=68>42
21+42=63>47
47+42=89>21

8. In a right angled triangle, the
square of the longest side is
equal to the sum of the squares
of the other two sides.