Question

In right ∆ABC, m B = 90°, m C = 40°, and BC = 10. What are the other two side lengths of the triangle?

A) AC = 13.1, AB = 8.4
B) AC = 18.7, AB = 15.8
C) AC = 14.3, AB = 10.2
D) AC = 15.6, AB = 11.9

How do I find the answer?

Answer 1

start by drawing a diagram



AB can be found using the tan ratio

and then AC can be found using either, sin, cos or pythagoras' theorem

hope it helps

Answer 2

I know angle A is 50 degrees, but I don't know anything dealing with the tan ratio, sin, cos, or pythagoras' theorem.

Answer 3

ok... so if you haven't studied trigonometry you can answer the question