Question

Find the value of the unknown exterior angle x in the below diagrams:
A= 50° b= 70° c=?

Answer 1

Answer:

c = 60°

Step-by-step explanation:

In Δ ABC :

∠A + ∠B + ∠C = 180° (Angle-Sim Property of Triangle)

50° + 70° + ∠C = 180

∠C = 180 - (50 + 70)

∠C = 180 - 120

∠C = 60

if x is adjacent to a

180 - A = x

180- 50 = x

130 = x

if x is adjacent to b

180 - B = x

180- 70 = x

110 = x

if x is adjacent c

180- C=x

180-60 = x

120 =x