Question

In a ΔABC, ∠A = x°, ∠B = (3x)° and ∠C = y°.
If 3y — 5x = 30, show that the triangle is right – angled.

Answer 1

Answer:

Step-by-step explanation:

we know that sum of angles of a triangle=180

x+3x+y=180

4x+y=180

y=180-4x

substituting it in the given equation,3(180-4x)-5x=30

540-12x-5x=30

17x=510,x=30

then angle A=3(30)=90

therefore it is a right angled triangle