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Question

In a ABC,A=x,B=3x and C=y. If 3y5x=30, then prove that the triangle is right angled triangle.

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Solution

Given:A=x,B=3x,C=y
Sumofle=x+3x+y
180=4x+y
1804x=y
Also,3y5x=30
Subtituting y value, 3(1804x)5x=30
x=30,bysolving
y=1804×30=60
A=30;B=90;C=60

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