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if the angles of a triangle are in the ratio 9:7:5, how big is the largest angle?

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if the angles of a triangle are in the ratio 9:7:5, how big is the largest angle?

 

asked Nov 26, 2013 in GEOMETRY by rockstar Apprentice

1 Answer

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The angles of triangle are in ratio 9:7:5

We know that sum of 3 angle of triangle is 180.

Here 9x,7x,5x represents  angles of triangle.

9x+7x+5x = 180

21x = 180

x = 180/21 = 8.57

first angle of triangle is 9*8.57 = 77.14

second angle of triangle = 7*8.57 = 60

third angle of triangle = 5*8.57 = 42.85

In given triangle largest angle is 77.14

answered Nov 26, 2013 by william Mentor

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