Question

What is the degree measure of f?
370
53
56
71

Answer 1

56

Explanation:

All angles in a triangle=180

since 109 is a supplementary angle(supplementary angles= 109+x=180

109+x=180

x=71

the 3rd angle is 71

now,

71+53+f=180(all angles in a triangle=180)

124+f=180

f=56

Hope this helps!

Answer 2

56

Explanation:

180-109=71

71+53=124

180-124=56