3 years ago

Parallelogram (x 40) and (3x)

1 answer:

8 0

x-y=2y -> x=3y and
3x-40+2y=180 --> 9y-40+2y=180 --> 11y=220 --> y=20, x=60 --> <A=<C=140 degrees, <B=<D=40 degrees.

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