Maths / Triangles / Exterior Angle Property

QUESTION
 

An exterior angle of a triangle is large dpi{100} 120^0 and its interior opposite angles are in the ratio 2:3.The angles of the triangle are

OPTIONS
A. 

dpi{100} 48^0,56^0,76^0

B. 

50^0,60^0,70^0

C. 

52^0,56^0,72^0

D. 

large 48^0,60^0,72^0

Right Option : D

EXPLANATION
Explain TypeExplanation Content
Text

Let the common factor be x so the angles are 2x and 3x

exterior angle = sum of interior opposite angles

2x + 3x = 120

5x = 120

x = 24

so the angles are 60, 48, 72

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