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Find the area of a triangle when extra sides are given

Year 7 maths · Fieldbook Learning

Name ______________________ Date __________

Use only the base and the height. The slanted sides are extra information.

  1. A triangle has a base of 2 cm and a height of 2 cm, and slanted sides of 6 cm and 8 cm. What is its area?
  2. A triangle has a base of 8 cm and a height of 7 cm, and slanted sides of 8 cm and 12 cm. What is its area?
  3. A triangle has a base of 12 cm and a height of 6 cm, and slanted sides of 7 cm and 11 cm. What is its area?
  4. A triangle has a base of 10 cm and a height of 4 cm, and slanted sides of 6 cm and 12 cm. What is its area?
  5. A triangle has a base of 6 cm and a height of 3 cm, and slanted sides of 5 cm and 8 cm. What is its area?
  6. A triangle has a base of 14 cm and a height of 6 cm, and slanted sides of 10 cm and 12 cm. What is its area?
  7. A triangle has a base of 8 cm and a height of 16 cm, and slanted sides of 20 cm and 22 cm. What is its area?
  8. A triangle has a base of 8 cm and a height of 9 cm, and slanted sides of 11 cm and 14 cm. What is its area?
  9. A triangle has a base of 12 cm and a height of 12 cm, and slanted sides of 15 cm and 17 cm. What is its area?
  10. A triangle has a base of 4 cm and a height of 16 cm, and slanted sides of 19 cm and 21 cm. What is its area?
  11. A triangle has a base of 6 cm and a height of 17 cm, and slanted sides of 20 cm and 24 cm. What is its area?
  12. A triangle has a base of 4 cm and a height of 9 cm, and slanted sides of 11 cm and 16 cm. What is its area?
  13. A triangle has a base of 21 cm and a height of 8 cm, and slanted sides of 10 cm and 16 cm. What is its area?
  14. A triangle has a base of 19 cm and a height of 37 cm, and slanted sides of 39 cm and 43 cm. What is its area?
  15. A triangle has a base of 5 cm and a height of 5 cm, and slanted sides of 7 cm and 11 cm. What is its area?
  16. A triangle has a base of 20 cm and a height of 33 cm, and slanted sides of 37 cm and 38 cm. What is its area?
  17. A triangle has a base of 85 m and a height of 50 m, and slanted sides of 51 m and 56 m. What is its area?
  18. A triangle has a base of 30 m and a height of 94 m, and slanted sides of 95 m and 99 m. What is its area?
  19. A triangle has a base of 19 m and a height of 35 m, and slanted sides of 36 m and 40 m. What is its area?
  20. A triangle has a base of 66 m and a height of 12 m, and slanted sides of 13 m and 17 m. What is its area?
More free practice: fieldbooklearning.com/uk/practice/year-7/area-of-triangles-with-extra-side-lengths/

Play it as a quiz game

20 of these questions as multiple choice, with near-miss wrong answers, ready for Kahoot or Blooket.

  1. Download the game's own question template: in Kahoot, Add question → Import spreadsheet; in Blooket, Create a set → Spreadsheet import.
  2. Click the matching button below, then click the first empty question row of the template and paste.
  3. Save the template (Kahoot needs .xlsx, Blooket .csv) and upload it.
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Answer key: Find the area of a triangle when extra sides are given

  1. 2 cm²
  2. 28 cm²
  3. 36 cm²
  4. 20 cm²
  5. 9 cm²
  6. 42 cm²
  7. 64 cm²
  8. 36 cm²
  9. 72 cm²
  10. 32 cm²
  11. 51 cm²
  12. 18 cm²
  13. 84 cm²
  14. 351.5 cm²
  15. 12.5 cm²
  16. 330 cm²
  17. 2125 m²
  18. 1410 m²
  19. 332.5 m²
  20. 396 m²