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The formula for the area A

A

of a trapezoid is A=12h (b1+b2)

A

1

2

h

b

1

b

2

, where h

h

is the height and b1

b

1

and b2

b

2

are the lengths of the two bases. Solve the formula for b1

b

1

.

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Answers (1)
  1. 25 July, 20:23
    0
    A = 1/2h (b1 + b2)

    2A = h (b1 + b2)

    2A/h = b1 + b2

    b1 = 2A/h - b2
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