Question

I just need help solving this problem.

Answer 1

see below

Explanation:

sum of angles in right triangle is 180

90 + 50 = 140

b = 180 - 140 = 40 deg

find c

cos(50) = 20/ c

c = 20/cos(50) = 31.1

find a

tan(40) = 20/a

a = 20/tan(40) = 23.8