Question

if two supplementary angle are in the ratio 13:5 then find the angle

Answer 1

sum of two supplementary angle is 180 +180 =360
let the angles be 13x and 5x
so,13x+5x=360
18x=360
x=360/18 =20
therefore the angle measure
13×20=260
5×20 =100

Answer 2

The ratio of two complementary angles is 13:5.

Now let the angles are 13x and 5x

We know that, 13x+5x=$90^{0}$

That is, x=5

Therefore, the angles are $65^{0}$ and $25^{0}$ respectively.

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