1. <A= sin a/c
= sin 26/31
=sin 0.8387=57degree
<A= 57degree
2.<B= cos a/c
= cos 26/31
= cos 0.8387=33degree
<B = 33degree
3.<C=90 degree cause it already gave us the sign of perpendicular sign
4. B=(c^2 - a^2)square root
=(31^2-26^2)square root
=(961-676)square root
=(285)square root
B=
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