4 years ago

Figure CDEF is a parallelogram.

Mathematics

2 answers:

GrogVix [38]4 years ago

8 0

Answer:

Step-by-step explanation:

We know that FC = 10r - 20 and that DE = 6r. They can make an equation together since they are parallel and congruent. That gives us the equation

10r - 20 = 6r

-20 = -4r

5 = r

10r - 20 = 6r

10 = 6r + 20

4r = 20

r = 5

Either way, you still get the answer of r = 5.

marishachu [46]4 years ago

7 0

Answer:

its 5

Step-by-step explanation:

opposite sides need to be equal

edge 2020

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