# Angles A and B are complementary.If mangle A=27∘, what is the mangle B?mangle B=□ degrees

Transformation properties

Angles A and B are complementary. If $$\displaystyle{m}\angle{A}={27}∘$$, what is the $$m\angle B?$$ $$\displaystyle{m}\angle{B}= \circ {d}{e}{g}{r}{e}{e}{s}$$

$$\displaystyle{m}\angle{A}+{m}\angle{B}={90}∘$$
$$\displaystyle{27}∘+{m}\angle{B}={90}∘$$
$$\displaystyle{m}\angle{B}={63}∘$$