1. A parallelogram each of whose angles measures 90° is ______________.

2. The number of sides in a regular polygon is 15 , then measure of each exterior angle is

3. The angle sum of all interior angles of a convex polygon of sides 7 is

4. Maximum number of right angles in a right angled triangle are

5. All the angles of a regular polygon are of ______________.

6. Polygons that have any portions of their diagonals in their exteriors are called

7. A polygon with minimum number of sides is

8. How many measurements are required to construct a quadrilateral, uniquely?

9. To construct a quadrilateral, we need to know two diagonals and _____ sides.

10. If two diagonals and three sides are given, then: