Question

the measures of interiar angles of a triangle arfe in the ratio 3:4:5.find the measures of bits angles

Answer 1

let the angle=x
let first angle=3x
let the second angle=4x
let the third angle=5x
angle first+angle second+ angle third=180(angle sum property)

3x+4x+5x=180
12x=180
x=180/12
x=15

first angle=3x=3×15=45°
second angle =4x=4×15=60°
third angle=5x=5×15=75°

Answer 2

Heya HERE is your answer

Let these angle be 3x,4x,5x

3x + 4x +5x =180 (sum of the angle of triangle=180)
12x=180
x = 180/12
x = 15

Angle 1st= 3×15 =45
Angle 2nd= 4×15 =60
Angle 3rd = 5×15=75

HOPE IT helps you