Angles A and B are supplementary. If mangle A= 78° what is mangle B?

Question
Transformation properties
asked 2020-11-27
Angles A and B are supplementary.
If \(\displaystyle{m}\angle{A}={78}°\ {w}\hat{{i}}{s}\ {P}{S}{K}{m}\angle{B}?\)

Answers (1)

2020-11-28
The measures of supplementary angles add up to 180∘. So if \(\displaystyle{m}\angle{A}={78}∘\), then the measure of angle B must be \(\displaystyle{m}\angle{B}={180}∘−{m}\angle{A}={180}∘−{78}∘={102}∘\)
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