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The angles of triangle $A BC$ are angle $A = 2 x$ deg, angle $B = 3 x$ deg and angle $C = 4 x$ deg.
Which side is the longest?

Class 9Inequalities in a TriangleGeometry — Triangles

AAB
BBC
CCA
DCannot be determined

Step-by-Step Solution

Sum:

2 x + 3 x + 4 x = 9 x = 180

, so

x = 20

. Angles:

A = 40, B = 60, C = 80

. Largest angle

C

is opposite

A B

, so

A B

is the longest side.

Answer: A) AB

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