Question

In the diagram below, if the measure of < C = 45 °, and side AB = 9, then side BC = _____.

Answer 1

Given the shown trangle

where the angle C= 45°

Side AB (Opposite) = 9

side BC(Adjacen)= ?

then

$tan(\emptyset)=\frac{Opp}{Adj}$$tan(45)=\frac{9}{BC}$$BC=\frac{9}{tan(45)}$$BC=\frac{9}{1}=9$

Correct answer is

option C

9