Question

Angles of a triangle are in the ration 3:4:5. Find largest angle of the triangle.

Answer 1

let 3x 4x 5xbe the angles of traingle
we know sum is 180 all angles
sooo
3x+4x+5x=180
12x=180
x=15
so largest angle=5x=5*15=75
hope you understand

Answer 2

let the side of the triangle be 3x 4 x and 5 x
so, 3 X + 4 x + 5 x= 180 degree
12x =180
x = 15
now 3 X is equals to 3x 15= 45
4x = 4 x 15 =60
5x = 5 x 15= 75
so 5x = 75 degree is greater .
hope it helps u