1. The measures of the three angles of a triangle are in the ratio 3:4:5. What is the measure of the biggest angle?
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By: anil on 05 May 2019 02.13 am
Let the three angles of the triangle be $$3x , 4x , 5x$$ Sum of internal angles of a triangle = 180° => $$3x + 4x+5x = 180$$° => $$12x=180$$° => $$x=frac{180}{12}=15$$° $$ herefore$$ Biggest angle = $$5x=5 imes 15=75$$° => Ans - (A)
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