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28 April, 09:15

Say that a and b are the lengths of the legs of a right triangle and c is the length of the hypotenuse. Find b if a = 21 and c = 29.

A) b = 40

B) B = 20

C) B = 10

D) B = 400

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Answers (1)
  1. 28 April, 13:02
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    When the triangle is a right triangle, you can use the Pythagorean theorem. The formula would be

    c^2 = a^2 + b^2

    If a = 21 and c=29, thus

    b^2 = c^2 - a^2

    b^2 = 29^2 - 21^2

    b^2 = 400

    b = square root (400)

    b = 20 units.

    Thus, the answer is D) B = 400
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