Question

One of the angles of a triangle is equal to the sum of the other two angles. If the ratio of other two angles is
4:5 find all angles of the triangle​

Answer 1

let the angles are 4x,5x

so third angle is 4x+5x=9x

4x+5x+9x=180°(angle sum property)

=>18x=180

=>x=10

so, the angles are 40°,50°,90°

Answer 2

Step-by-step explanation:

4:5=180°

4x+5x+x=180°

10x=180°

x=180/10

x=18

4(x)=4(18)=72

5(x)=5(18)=90

x=18

All angles in triangle=72°+90°+18°=180°