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in the triangle ABC , /A=x^@,/B=3x^@,/C=...

in the triangle `ABC , /_A=x^@,/_B=3x^@,/_C=y^@`. if `3y-5x=30` then prove that the triangle is right angled.

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The correct Answer is:
`angleA = 30^(@), angleB = 90^(@), angleC = 60^(@)`
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NAGEEN PRAKASHAN-LINEAR EQUATIONS IN TWO VARIABLES -Exercise 3e
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