Question

In triangle ABC, AB=AC, angle A=(5x+20) and angle B= 2/5 of angle A. find the measure of angle A​

Answer 1

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Answer 2

Answer:

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Step-by-step explanation:

Answer:Angle a = 100

Step-by-step explanation:

let angle a be 'x'

therefore angle b = angle c = 2/5x

by angle sum property 2/5x + 2/5x + x  = 180

4/5x + x = 180

4/5x + 5/5x = 180 (taking lcm)

9/5x = 180

9x= 180*5

9x = 900

x=100 (Angle A)

2/5x = 40 (Angle b and c)