Question

the angles of a triangle are5(y-1),3(2y-5),9y.find the y

Answer 1

sum of the angles of a triangle is 180. add all the three equating the sun to 180 degrees..
(ans.y=10)

Answer 2

Hey Friend,

Here, First Side = 5(y-1) = 5y-5
Second Side = 3(2y-5) = 6y-15
Third Side = 9y
We know that the sum of the all angles of a triangle = 180degree
Acc. To Question,
(5y - 5) + (6y - 15) + (9y) = 180degree
5y +6y + 9y - 5 - 15 = 180degree
20y - 20 = 180degree
20y = 180 + 20
20y = 200
y = 200/20
y = 10
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