Question

If the angle of triangle are in the ratio 1:4:5, find the angles
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Answer 1

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Answer 2

Answer:

ratio = 1:4:5

let ratio =1x:4x:5x

we know that sum of all angles of a triangle is 180°

AtoQ

1x+4x+5x=180° (angle sum property)

10x=180°

x=180°/10

x=18°

angle 1=18°

angle 2= 4×18°=72°

angle 3= 5×18°=90°