If a and b are parallel lines and m 3=128 what is the measure of 8

Mathematics

1 answer:

ASHA 777 [7]3 years ago

4 0

The correct question is
If a and b are parallel lines, and m∠3 = 128°, what is the measure of ∠8?

see the attached drawing

we have
m∠3 = 128°
m∠3 = m∠7---------------- > Corresponding Angles
180°=m∠7+m∠8---------- > Supplementary Angles
therefore
m∠8=180°-128°=52°

the answer is the m∠8 is 52°

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