1. How many sides does decagon has?

2. How many measurements can determine a quadrilateral uniquely?

3. The diagonals of a square are ______________ each other

4. The opposite angles of a parallelogram are ______________ .

5. What is the sum of the measures of angles of a convex quadrilaterals?

6. How many diagonals does a regular Hexagon has?

7. How many sides does a heptagon have?

8. Minimum possible interior angle in a regular polygon is ______________.

9. The diagonals of a square bisect each other at ______________ angle.

10. the diagonals of a rhombus bisect each other at ______________ angles.