Question

help me please

Answer 1

the segment AB is the side that corresponds to angle C (so simply name it c)
the segment AC is the side that corresponds to angle B (so simply name it b)

(using precisely a capital case letter to denote and angle, and a lower case letter to denote a side)

STEPS:
use the Pythagorean theorem: \(\normalsize\color{royalblue}{ \rm a^2+b^2=c^2 }\), to find the segment BC (this segment is side a, because it corresponds to angle A)

Then, use the sine law.

\(\large\color{royalblue}{ \displaystyle \rm \frac{a}{{\rm Sin}(A)}= \frac{c}{{\rm Sin}(C)} }\)