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Year 7 maths · H.3 · Area

Find the area of a triangle when extra sides are given

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

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  1. A triangle has a base of 6 cm and a height of 8 cm, and slanted sides of 11 cm and 17 cm. What is its area?

    Answer: 24 cm²

  2. A triangle has a base of 8 cm and a height of 6 cm, and slanted sides of 7 cm and 15 cm. What is its area?

    Answer: 24 cm²

  3. A triangle has a base of 8 cm and a height of 6 cm, and slanted sides of 8 cm and 13 cm. What is its area?

    Answer: 24 cm²

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

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