# Worksheet: Perimeter of a Triangle

In this worksheet, we will practice finding the perimeter of a triangle as a value and as an algebraic expression by adding its side lengths.

**Q3: **

The base of an isosceles triangle is 4 more than the length of one of the equal sides. Let be the length of one of the equal sides and write an equation for , the perimeter of the triangle.

- A
- B
- C
- D
- E

**Q4: **

Calculate the perimeter of an equilateral triangle whose side length is 3.39 cm.

**Q5: **

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

**Q6: **

If the perimeter of this triangle is 234, find the length of the third side.

**Q7: **

The perimeter of a triangular piece of land is 166 meters. Find the length of its third side if the sum of two of its sides is 102 meters.

**Q8: **

The side length of an equilateral triangle is units and its perimeter is units. Write the mathematical relation between and .

- A
- B
- C
- D
- E

**Q9: **

Given that and , find the perimeter of to the nearest hundredth, if needed.

**Q10: **

Find the perimeters of and .

- A perimeter of , perimeter of
- B perimeter of , perimeter of
- C perimeter of , perimeter of
- D perimeter of , perimeter of

**Q11: **

Find the perimeter of .

**Q12: **

is a triangle where , and . Find the perimeter of the triangle giving the answer to the nearest centimetre.

**Q13: **

is a triangle, where cm, cm, and the perimeter is 124 cm. Find the lengths of and giving the answers to the nearest centimetre.

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

**Q14: **

The perimeter of a triangle is given by cm. The lengths of two of its sides are cm and cm. Express the length of the third side in terms of .

- A cm
- B cm
- C cm
- D cm

**Q15: **

In triangle we have and . If the perimeter of the triangle is 46.2, what is the length of ?

**Q16: **

Determine the perimeter of the triangle whose sides have the same length of 22 cm.

**Q17: **

What is the range of possible perimeters, , of the given figure if and ?

- A
- B
- C
- D
- E

**Q18: **

Find the perimeter of a triangle whose side lengths are 7, 25, and 22.

**Q19: **

Find the perimeter of a triangle whose side lengths are 8 cm, 10 cm, and 4 cm.

**Q20: **

A triangle of perimeter 37 has two sides of lengths 11 and 8. What is the length of the third side?

**Q21: **

Calculate the perimeter of the triangle.

**Q22: **

A triangular fountain has a perimeter of 123 feet. If one of its sides is 32 feet long, and another is 57 feet long, determine the length of its third side.

**Q23: **

What is the perimeter of triangle , given that , , and ?

**Q24: **

A triangle has a perimeter of 44. If two of the sides have lengths 19 and 13, what is the length of the third side?

**Q25: **

Determine the perimeter of the triangle , given that , , and .