# Lesson Worksheet: Special Quadrilaterals Mathematics

In this worksheet, we will practice using the properties of special quadrilaterals to solve problems involving algebraic expressions, equations, and coordinates.

**Q1: **

Given that , determine the length of .

**Q3: **

In parallelogram , , , and . What is the perimeter of ?

**Q4: **

What can you say about the diagonals of a parallelogram?

- AThey are equal in length.
- BThey bisect each other.
- CThey are perpendicular.

**Q5: **

Is any quadrilateral whose diagonals bisect each other a parallelogram?

- AYes
- BNo

**Q6: **

Are the two diagonals of a parallelogram perpendicular?

- ANo
- BYes

**Q7: **

If is a parallelogram, find the value of .

**Q8: **

The given figure shows a parallelogram .

Using what you know about alternate angles, determine which angle will have the same measure as .

- A
- B
- C
- D
- E

Which angle will be equal in measure to ?

- A
- B
- C
- D
- E

is a common side to triangle and triangle . Using the information from the earlier parts of the question, can we prove that triangles and are congruent? If yes, by which congruence criteria?

- AYes, by ASA
- BNo
- CYes, by SAS
- DYes, by SSS
- EYes, by HL

What will be true of and and of and ?

- A,
- B,
- C,
- D,

What will be true of angles and and of angles and ?

- A,
- B,
- C,
- D,

**Q10: **

In a parallelogram , the coordinates of , , and are , , and , respectively. Find the coordinates of the point at which the two diagonals intersect, and then determine the coordinates of point .

- A,
- B,
- C,
- D,

**Q11: **

is a parallelogram where the coordinates of are and the coordinates of are . Find the coordinates of the point of intersection of the two diagonals of .

- A
- B
- C
- D

**Q12: **

In parallelogram , the coordinates of are and those of the intersection of the diagonals are . What are the coordinates of point ?

- A
- B
- C
- D
- E

**Q14: **

In parallelogram , , , and . What is the perimeter of ?

**Q15: **

If is a parallelogram, find the value of .

**Q16: **

is a parallelogram where the coordinates of are and the coordinates of are . Find the coordinates of the point of intersection of the two diagonals of .

- A
- B
- C
- D

**Q18: **

In a parallelogram , the coordinates of , , and are , , and , respectively. Find the coordinates of the point at which the two diagonals intersect, and then determine the coordinates of point .

- A,
- B,
- C,
- D,

**Q24: **

The lengths of two adjacent sides of a parallelogram are units and units. Write an expression for its perimeter.

- A units
- B units
- C units
- D units
- E units