Question

in triangle abc angle A + angle b is equal to 110 degree and angle C+angle A is equal to 135 degree find the angle

Answer 1

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Answer 2

Answer:

∠A+∠B= 110 ---1

∠A+∠C = 135 ---2

Since it is a triangle

So, sum of all angles of triangle is 180

∠A+∠B + ∠C = 180----3

Using 1

110 + ∠C = 180

∠C = 180-110

∠C = 70

Using 2

∠A+70 = 135

∠A = 135-70

∠A = 65

∠A+∠B + ∠C = 180

65+∠B +  70= 180

135+∠B = 180

∠B = 180 -135

∠B = 45