Question

In triangle abc A +B = 65 and B +C= 140 .Find the value of B and C

Answer 1

A+B+C=180
65+C=180
C=180-65
C= 115

B+C=140
B+115=140
B=140-115
B=25

Answer 2

Answer: ∠A = 40 , ∠B = 25 and ∠C = 115

Step-by-step explanation:

∠A + ∠B = 65

∠B + ∠C = 140

∠A + ∠B + ∠B + ∠C = 65 + 140

(∠A + ∠B + ∠C) + ∠B = 205

180 + ∠B = 205

∠B = 205 - 180

∠B = 25

∠C = 140 - ∠B

∠C = 140 - 25

∠C = 115

∠A = 65 - ∠B

∠A = 65 - 25

∠A = 40

Therefore  

∠A = 40 , ∠B = 25 and ∠C = 115