Question

In ∆ABC, ∠A : ∠B : ∠C = 2: 3 :5. Prove that ∆ABC is a right triangle.

Answer 1

Answer:

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Step-by-step explanation:

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2x - First angle

3x - Second angle

5x - Third angle

by angle sum property - 2x+3x+5x = 180

10x=180

x=180/10

x=18

then,

2*x

2*18 = 36

3*x

3*18 = 54

5*x

5*18 = 90

As one of the angle is 90° hence, ∆ABC is a right triangle ...