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16 May, 12:40

3) What radius of a circle is required to inscribe an equilateral triangle with an area of 270.633 cm2 and an altitude of 21.65 cm? (round to nearest tenth)

A) 10.8 cm

B) 14.4 cm

C) 15.4 cm

D) 16.4 cm

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Answers (2)
  1. 16 May, 13:49
    0
    B) 14.4 is the correct answer
  2. 16 May, 15:20
    0
    14.4 cm

    First, find side lengths,

    A = 12 bh

    270.633 = 12 b (21.65)

    b = 25

    Thus, 25 is the side lengths of the equilateral triangle.

    To find the radius use,

    r = a3 3

    r = 253 3

    r = 14.43
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