# CBSE Class 9 Answered

**Construct a triangle ABC having perimeter 12 cm and angles in the ratio 3:4:5.**

Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM

Expert Answer

Let the angles of the given triangle be 3x, 4x and 5x

Then, 3x + 4x + 5x = 180

^{o}Therefore, x = 15

Hence the angles are 45

^{o}, 60^{o}and 75^{o}Steps of construction.

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Answered by | 04 Jun, 2014, 03:23: PM

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