🧠 Grade 3 Math Quiz · Perimeter and Area

Perimeter and Area Practice Questions

70 Grade 3 questions on Perimeter and Area. Choose an answer to get instant feedback and a short explanation — the first 10 are free.

What is the perimeter of a square with each side 8 cm?

Explanation: Perimeter = 4 × 8 = 32 cm.

A rectangle is 12 cm long and 5 cm wide. What is its perimeter?

Explanation: 2 × (12 + 5) = 34 cm.

What is the perimeter of a triangle with sides 9 cm, 10 cm, and 11 cm?

Explanation: 9 + 10 + 11 = 30 cm.

Which shape has the largest perimeter?

Explanation: Rectangle perimeter = 2×(15+4) = 38 cm (largest).

A garden is 20 m long and 12 m wide. How much fence is needed around it?

Explanation: 2 × (20 + 12) = 64 m.

What does perimeter mean?

Explanation: Perimeter is the total distance around the outside of a shape.

A square has a perimeter of 40 cm. What is the length of one side?

Explanation: 40 ÷ 4 = 10 cm.

What is the area of a rectangle that is 9 cm long and 6 cm wide?

Explanation: 9 × 6 = 54 cm².

How many square centimetres are in a 7 cm by 7 cm square?

Explanation: 7 × 7 = 49 cm².

A rectangle has an area of 72 cm² and a length of 9 cm. What is its width?

Explanation: Width = 72 ÷ 9 = 8 cm.

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