Question

In triangleAngleA+angleB is = 100 and angle B +angle C is =135 then fing angle A,B,C

Answer 1

Since..
By Angle Sum Property Of triangle
We know that AngleA + Angle B + Angle C = 180---1

Angle A + Angle B = 100----2
Angle B + Angle C = 135-----3
adding 3 and 2

A + 2B + C = 235

A + C = 235 - 2B-----4

235 - 2B + B = 180 ( from 1 and 4)
B = 235 - 180

B = 55

A = 100 - 55 = 45 (from 2)

C = 135 - 55 = 80 (from 3)

Angle A = 45
Angle B = 55
Angle C = 80

Hope It helps.....