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3 February, 14:22

A triangle has a base of 4 units and a height of 3 units. Mark draws the triangle again but

doubles the height. How does the area of the triangle change?

The area increases by 3 square units.

The area increases by 6 square units.

The area increases by 12 square units.

The area does not change.

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Answers (2)
  1. 3 February, 14:27
    0
    Second option: The area increases by 6 square units.

    Step-by-step explanation:

    A1 = ½ * 4 * 3 = 6 units²

    A2 = ½ * 4 * 2 (3) = 12 units²

    Increase: 12 - 6 = 6 units²
  2. 3 February, 16:10
    0
    The area increases by 6 square units.

    Step-by-step explanation:

    The original area of triangle

    A = 1/2 bh

    a = 1/2 (4) * 3

    6 square units

    Now we double the height

    A = 1/2 (4) * 6

    A = 12 square units

    The difference is 12-6 = 6 square units
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