# Lesson Worksheet: Perimeter of Polygons Mathematics • 3rd Grade

In this worksheet, we will practice measuring the lengths of shapes and adding to find their perimeter.

**Q4: **

Find the perimeter of the shape below.

**Q5: **

What is the perimeter of the shape below?

**Q6: **

Find the perimeter of the shape.

**Q7: **

If the perimeter of the shown figure is 54, determine the length of the last side.

**Q8: **

A square has side lengths of 10 cm and a triangle has sides of length 13 cm, 12 cm, and 3 cm. Which shape has the longer perimeter?

- Athe triangle
- Bthe square

**Q9: **

Given that the perimeter of the figure is 40 yd, determine the length of the missing side.

**Q10: **

The lengths of two sides of an octagon-shaped table are 24 feet each, and the other six sides are 8 feet each. What is the perimeter of that table?

**Q11: **

The perimeter of a regular heptagon is 42. What is the length of a side?

**Q12: **

What is the side of a regular hexagon of perimeter 966?

**Q13: **

What is the perimeter of the following hexagon?

**Q14: **

How many units of length is the perimeter of the hexagon?

**Q15: **

Benjamin’s garden has 5 sides which are equal in length. If each side is 18 feet long, determine its perimeter.

**Q16: **

The perimeter of the shape is length units.

**Q17: **

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

**Q18: **

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

**Q19: **

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

**Q20: **

Calculate the perimeter of the triangle.

**Q21: **

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

**Q22: **

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?

**Q24: **

What is the perimeter of the given shape?

**Q25: **

Which shape has the biggest perimeter?

- AShape A
- BShape B
- CShape C