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The angles of a triangle are $(2 x), (3 x)$ and $(4 x + 18)$ degrees.
Find the largest angle of the triangle.

Class 9Angle Sum of a TriangleGeometry — Lines and Angles

A180
B90
C81
D99

Step-by-Step Solution

2 x + 3 x + 4 x + 18 = 180

, so

9 x = 162, x = 18

. Largest =

4 x + 18 = 72 + 18 = 90

deg.

Answer: B) 90

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