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Grade 7 Area of trapezoids Worksheets

Grade 7 practice: Use one half times the sum of the parallel sides times the height. Choose a level below to generate a fresh set of questions.

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Understanding area of trapezoids

Area of a trapezoid asks learners in Grades 6 and 7 to find the space inside a four-sided figure with one pair of parallel sides. Because the two parallel sides differ in length, you average them and multiply by the perpendicular height: A = ½(a + b)h. This generalises the rectangle and triangle area rules to a shape that sits between them.

For example, parallel sides of 6 cm and 10 cm with a height of 4 cm give A = ½(6 + 10) × 4 = ½ × 16 × 4 = 32 cm². A common mistake is multiplying the two parallel sides together, or forgetting to halve the sum. Tip: add the two parallel sides first, take half of that total to get their average, then multiply by the height — and make sure the height is the perpendicular distance between the parallel sides, not a slanted side.

Sample area of trapezoids questions

These examples come from the Easy setting. Generate a worksheet for a complete page with space for working.

  1. A trapezoid has parallel sides 8 cm and 8 cm with height 4 cm. Find its area.
  2. A trapezoid has parallel sides 12 cm and 8 cm with height 5 cm. Find its area.
  3. A trapezoid has parallel sides 6 cm and 4 cm with height 7 cm. Find its area.
  4. A trapezoid has parallel sides 6 cm and 10 cm with height 4 cm. Find its area.
Check the sample answers
  1. 32 cm²
  2. 50 cm²
  3. 35 cm²
  4. 32 cm²

Practice focus

Use one half times the sum of the parallel sides times the height. Show each step and check the answer.

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