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Class 7–8 Maths: Triangle area practice questions

Practise triangle area for Classes 7 and 8. Try the 10-question quiz below and see each answer explained straight away, then read all 12 worked examples with answers underneath. Free, no sign-up.

Triangle area: worked examples with answers

These Maths questions are generated, so a fresh set appears every time you press "Practise more questions". Here are some worked examples.

1. A triangle has a base of 18 cm and a height of 13 cm. What is its area?

   1. A. 117 cm² ✓
   2. B. 130 cm²
   3. C. 31 cm²
   4. D. 468 cm²

   Answer: 117 cm². Area = ½ × base × height = ½ × 18 × 13 = 117 cm².

2. A triangle has a base of 6 cm and a height of 14 cm. What is its area?

   1. A. 168 cm²
   2. B. 36 cm²
   3. C. 42 cm² ✓
   4. D. 84 cm²

   Answer: 42 cm². Area = ½ × base × height = ½ × 6 × 14 = 42 cm².

3. A triangle has a base of 26 cm and a height of 18 cm. What is its area?

   1. A. 234 cm² ✓
   2. B. 936 cm²
   3. C. 252 cm²
   4. D. 468 cm²

   Answer: 234 cm². Area = ½ × base × height = ½ × 26 × 18 = 234 cm².

4. A triangle has a base of 8 cm and a height of 5 cm. What is its area?

   1. A. 40 cm²
   2. B. 80 cm²
   3. C. 25 cm²
   4. D. 20 cm² ✓

   Answer: 20 cm². Area = ½ × base × height = ½ × 8 × 5 = 20 cm².

5. A triangle has a base of 18 cm and a height of 16 cm. What is its area?

   1. A. 144 cm² ✓
   2. B. 160 cm²
   3. C. 576 cm²
   4. D. 288 cm²

   Answer: 144 cm². Area = ½ × base × height = ½ × 18 × 16 = 144 cm².

6. A triangle has a base of 12 cm and a height of 16 cm. What is its area?

   1. A. 112 cm²
   2. B. 84 cm²
   3. C. 96 cm² ✓
   4. D. 384 cm²

   Answer: 96 cm². Area = ½ × base × height = ½ × 12 × 16 = 96 cm².

7. A triangle has a base of 14 cm and a height of 16 cm. What is its area?

   1. A. 224 cm²
   2. B. 128 cm²
   3. C. 112 cm² ✓
   4. D. 448 cm²

   Answer: 112 cm². Area = ½ × base × height = ½ × 14 × 16 = 112 cm².

8. A triangle has a base of 12 cm and a height of 15 cm. What is its area?

   1. A. 78 cm²
   2. B. 180 cm²
   3. C. 90 cm² ✓
   4. D. 105 cm²

   Answer: 90 cm². Area = ½ × base × height = ½ × 12 × 15 = 90 cm².

9. A triangle has a base of 20 cm and a height of 13 cm. What is its area?

   1. A. 520 cm²
   2. B. 130 cm² ✓
   3. C. 260 cm²
   4. D. 143 cm²

   Answer: 130 cm². Area = ½ × base × height = ½ × 20 × 13 = 130 cm².

10. A triangle has a base of 18 cm and a height of 18 cm. What is its area?

    1. A. 180 cm²
    2. B. 648 cm²
    3. C. 162 cm² ✓
    4. D. 36 cm²

    Answer: 162 cm². Area = ½ × base × height = ½ × 18 × 18 = 162 cm².

11. A triangle has a base of 18 cm and a height of 9 cm. What is its area?

    1. A. 27 cm²
    2. B. 162 cm²
    3. C. 324 cm²
    4. D. 81 cm² ✓

    Answer: 81 cm². Area = ½ × base × height = ½ × 18 × 9 = 81 cm².

12. A triangle has a base of 18 cm and a height of 17 cm. What is its area?

    1. A. 170 cm²
    2. B. 35 cm²
    3. C. 306 cm²
    4. D. 153 cm² ✓

    Answer: 153 cm². Area = ½ × base × height = ½ × 18 × 17 = 153 cm².

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