The area of a trapezoid is given by the formula A = 1/2 (b 1 + b 2) h, where base b 1 is parallel to base b 2 and h is the height. Solve the formula for b 2. Show your work.

Answers (1)
  1. Jemima
    The answer is b2 = 2A/h - b1

    A = 1/2 (b1 + b2) h

    Multiply both sides by 2:

    2 * A = 2 * 1/2 (b1 + b2) h

    2A = (b1 + b2) h

    Divide both sides by h:

    2A/h = (b1 + b2) h/h

    2A/h = b1 + b2

    Subtract b1 from both sides:

    2A/h - b1 = b1 + b2 - b1

    2A/h - b1 = b2
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