Question

In ∆ABC if the sum and difference of two angles A & B are 105° and 45° respectively then the measure of the three angles are :

A)75°, 75°, 30°
B)40°, 40°, 100°
C)110°, 35°, 35°
D)100°, 50°, 30°​

Answer 1

Step-by-step explanation:

let the unknown angle be x

105 + 45+x= 180

x= 180- 150

x=30

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