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)=(Opp)/(Adj)`
`tan(45)=(9)/(BC)`
`BC=(9)/(tan(45))`
`BC=(9)/(1)=9`

Correct answer is

option C

9