Question

Triangle ABC is shown. Which is CLOSEST to the measure of angle A?

Answer 1

B

Explanation:

use sine formula

`(sin~72)/(2.5) =(sin~A)/(2.1) \\sin~A=(2.1)/(2.5) * sin~72\\A=sin ^(-1)((21)/(25) * sin ~72) \approx 53^\circ\\`

Answer 2

c because the differene between b and are far