Question

In ∆ABC, ∠A+∠B=65º and ∠B+∠C=140º, then measure of ∠B is *


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Answer 1

Answer:

Step-by-step explanation:

In Triangle ABC,

By angle sum property,

Angle A + Angle B + Angle C = 180 degrees

Therefore, 65 + C = 180

c = 180 - 65

  = 115 degrees

Given: Angle B + Angle C = 140 degrees

B + 115 = 140

B = 140 - 115

Angle B = 25 degrees