Question

if the angles A, B, C of a triangle ABC are AP. then find value of angle b

Answer 1

Let angles A,B AND C

A=a-d

B=a

C=a+d

A+B+C=180

3a=180

a=60

B=a=60

Answer 2

as ABC are in a.p
B-A=C-B
2B=A+C...... (1)
sum of angle s in a triangle is 180
thus, A+C=180-B
substituting in (1).
we get,
2B=180-B
3B=180

thus, B=60 degrees......
...................... thankyou............................