Area & Perimeter
Rectangles, squares, triangles, circles and more — finding area and perimeter.
1. A rectangle has length 8 and width 5. What is its area?
2. A rectangle has length 8 and width 5. What is its perimeter?
3. A square has a side length of 6. What is its area?
4. A square has a side length of 6. What is its perimeter?
5. A triangle has a base of 10 and a height of 4. What is its area?
6. A circle has a radius of 7. What is its circumference? (use π ≈ 3.14)
7. A circle has a radius of 7. What is its area? (use π ≈ 3.14)
8. A rectangle has an area of 48 and a width of 6. What is its length?
9. A parallelogram has a base of 9 and a height of 5. What is its area?
10. A trapezoid has parallel sides of 6 and 10, and a height of 4. What is its area?
Answer key — Area & Perimeter
- C — 40. Area = length × width = 8 × 5 = 40.
- B — 26. Perimeter = 2 × (length + width) = 2 × 13 = 26.
- C — 36. Area = side × side = 6 × 6 = 36.
- A — 24. Perimeter = 4 × side = 4 × 6 = 24.
- B — 20. Area = 1/2 × base × height = 1/2 × 10 × 4 = 20.
- B — 44. Circumference = 2 × π × r = 2 × 3.14 × 7 ≈ 44.
- C — 154. Area = π × r² = 3.14 × 49 ≈ 154.
- B — 8. Length = area ÷ width = 48 ÷ 6 = 8.
- C — 45. Area = base × height = 9 × 5 = 45.
- A — 32. Area = 1/2 × (side1 + side2) × height = 1/2 × 16 × 4 = 32.
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