Question

If angles A, B and C in a triangle ABC are 3x, 5x and 8x+4 respectively, then find all the three angles.
(a) 33, 55, 92
(b) 70, 75, 35
(c) 90, 75, 15
(d) 90, 95, 100​

Answer 1

Answer:

Let A,B,C be 3 x and 5 x and (8x+4)

A+B+C=180°

Therefore,

3x + 5x + 8x + 4 = 180 degree

8x+8x+4=180°

16x=180°-4

x=176/16

x=11

A=3x=3×11=33°

B=5x=5×11=55°

C=8x+4=8×11+4=88+4=92°