Geometry: Area & Perimeter

Find area and perimeter for rectangles, triangles, squares, and circles.

17 questions, free, marked as you go with a worked explanation on every one.

What this covers

The questions

  1. A rectangle has length 8 and width 5. Find its area.
  2. A rectangle has length 8 and width 5. Find its perimeter.
  3. A triangle has base 10 and height 6. Find its area.
  4. A square has side length 7. Find its area.
  5. A circle has radius 3. Find its area (use π ≈ 3.14, round to the nearest tenth).
  6. A rectangle has length 12 and width 4. Find its perimeter.
  7. A triangle has base 8 and height 5. Find its area.
  8. A square has a perimeter of 36. Find its side length.
  9. A circle has radius 4. Find its circumference (use π ≈ 3.14).
  10. A rectangular yard measures 15 m by 9 m. A path 1 m wide runs right around the inside edge of the yard. What is the area of the grass left in the middle, in square metres?
  11. A parallelogram has a base of 9 and a height of 6. Find its area.
  12. A trapezoid has parallel sides of length 8 and 12, and a height of 5. Find its area.
  13. A rectangle has an area of 72 and a length of 9. What is its width?
  14. A triangle has an area of 36 and a base of 8. What is its height?
  15. A circle has a circumference of 31.4 cm (use π ≈ 3.14). What is its radius?
  16. A room shaped like a rectangle, 10 m by 7 m, has a triangular reading nook added to one side with a base of 4 m and a height of 3 m. What is the total floor area, in square metres?
  17. A square has an area of 81 cm². What is its perimeter, in centimetres?

Answer these free