Question

angle b is equal to 3 angle A and angle C minus 5 angle A equal to 30 degree find the angle of ABC​

Answer 1

Answer:

Let angle B be x.

Angle A - Angle B = 30°

Angle A = 30° + x

Angle B - Angle C = 15°

Angle C = x - 15°

Angle A + Angle B + Angle C = 180° ( Angle sum property of a triangle)

=> (30° + x) + (x) + ( x -15) = 180°

=> 3x + 15° = 180°

=> 3x = 165°

=> x =165° / 3

=> x = 55°

Angle B = x = 55°

Ans. = The measure of angle B is 55°.

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