In this worksheet, we will practice finding a missing angle measure or a missing side length in one of two congruent figures.

**Q1: **

Given that is the line of symmetry of the polygon , determine the perimeter of .

**Q3: **

In the figure, , , and are collinear, with . If is a line of symmetry of polygon , find and the length .

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

**Q4: **

Two of a triangle’s sides are 16 and 2. If the triangle has one line of symmetry, what is its perimeter?

**Q5: **

Given that is a line of symmetry for the shape , calculate .

**Q6: **

Segment has mirror symmetry in line . Given that and , calculate the perimeters of and .

- Aperimeter of , perimeter of
- Bperimeter of , perimeter of
- Cperimeter of , perimeter of
- Dperimeter of , perimeter of

**Q7: **

Given that is a line of symmetry for the shape , calculate .

**Q8: **

In the figure, , , and are collinear, with . If is a line of symmetry of polygon , find and the length .

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

**Q9: **

Two of a triangle’s sides are 18 and 7. If the triangle has one line of symmetry, what is its perimeter?

**Q10: **

Given that is the line of symmetry of the polygon , determine the perimeter of .

**Q11: **

Segment has mirror symmetry in line . Given that and , calculate the perimeters of and .

- Aperimeter of , perimeter of
- Bperimeter of , perimeter of
- Cperimeter of , perimeter of
- Dperimeter of , perimeter of

**Q12: **

Segment has mirror symmetry in line . Given that and , calculate the perimeters of and .

- Aperimeter of , perimeter of
- Bperimeter of , perimeter of
- Cperimeter of , perimeter of
- Dperimeter of , perimeter of