Question

In a triangle angle ABC angle A is 25 degree more than angle B ; and angle C is 10 degree less than angle B.What are the angles of the triangle?

Answer 1

let the angle B be x.
Then angle a =x+25
and angle c=x-10
(sum of the angles of a triangle =180
so (x+25)(x-10)+x=180
3x+15=180
3x. =180-15
x. = 165/3=55
thus A=55+25=80
B=55
c=55-10=45