Chapter 8: Quadrilaterals

Questions

1. Diagonals of a rectangle are equal — T/F?
2. Sum of interior angles of a quadrilateral.
3. In parallelogram, $\angle A = 70^\circ$; find $\angle B$.
4. Diagonals of a rhombus bisect at what angle?
5. Every rectangle is a $\ldots$?
6. State midpoint theorem.
7. $D, E$ midpoints of $AB, AC$ in $\triangle$: $BC = 10$; $DE = ?$
8. Adjacent angles of parallelogram are $3x$ and $(2x + 30)$. Find $x$.
9. Every square is a parallelogram — T/F?
10. In isosceles trapezium, non-parallel sides are $\ldots$?

Extra Practice (Optional)

• Prove: diagonals of parallelogram bisect each other.
• In parallelogram $ABCD$, if diagonals are equal, prove it is a rectangle.
• State converse of midpoint theorem.
• Prove: diagonals of rhombus are perpendicular.
• Number of diagonals of a quadrilateral.