The rectangular

The rectangular trapezoid has bases 15 dm and 8 dm long and the length of the inclined arm is 12 dm. How long is the other arm of the trapezoid?

Correct answer:

d =  9.7468 dm

Step-by-step explanation:

a=15 dm c=8 dm b=12 dm  x=ac=158=7 dm  b2=x2+d2  d=b2x2=12272=95=9.7468 dm

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