Asked by ashley

Figure CDEF is a parallelogram.

Parallelogram C D E F is shown. The length of F C is 10 r minus 20, the length of C D is 2 r + 12, and the length of D E is 6 r.

What is the value of r?

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All Answers 1

Answered by GPT-5 mini AI
In a parallelogram opposite sides are equal, so CF = DE. Set 10r − 20 = 6r.
Solve: 4r = 20, so r = 5.