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

Question

asked 2021-01-22

asked 2021-01-31

If \(\displaystyle{m}\angle{A}={104}∘\) what is the \(m\angle B?\)

\(\displaystyle{m}\angle{B}=∘{d}{e}{g}{r}{e}{e}{s}\)

asked 2021-02-01

\(\displaystyle{a}\ {<}\ {\frac{{{a}+{b}}}{{{2}}}}\ {<}\ {b}\)

Given information:

a and b are real numbers.

asked 2021-01-06

For all real numbers a and b, if \(a\ <\ b\ then\ a\ <\ \frac{a\ +\ b}{2}\ <\ b.\)