document.write( "Question 900352: In a triangle ABC angleA is x angleB is 3x amd angleC is y.If 3y-5x=30,Show that the triangle is right angled \n" ); document.write( "

Algebra.Com's Answer #545902 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "4x + y = 180   |Multiplying thru by 3
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document.write( "12x + 3y = 540
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document.write( "IF 3y = 
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document.write( "....
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document.write( "12x + 5x+30 = 540  |Substituting for y
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document.write( "  17x = 510
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document.write( "    x = 30
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document.write( "....
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document.write( "30,60,90 right Triangle \n" );
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