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15 August, 19:47

What is the area of a circle with a diameter of 15 mm? Use 3.14 for pie. Round to the nearest tenth.

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Answers (2)
  1. 15 August, 20:13
    0
    47.1

    Step-by-step explanation:

    A=PIEr^2

    if you have the diameter you dont need to square it so it is simply PIE (15)

    then you get 47.1238898

    round it

    47.1
  2. 15 August, 21:02
    0
    176.6 mm^2

    Step-by-step explanation:

    We need to find the radius

    r = d/2

    r = 15/2 = 7.5

    We want the area of a circle

    A = pi r^2

    A = pi * (7.5) ^2

    = 3.14 * 56.25

    =176.625

    Rounding to the nearest tenth

    176.6 mm^2
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