Question

Four angles of a quadrilateral are 3:5:7:9. Find them

Answer 1

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Sum Of All The Angles Of A Quadrilateral = 360 Degrees

Let The Angles Be 3x,5x,7x And 9x.

3x+5x+7x+9x  = 360

24x = 360

x = 360/24 = 180/12 = 90/6 = 45/3 = 15 

So Angles = 15*3 = 45°
,15*5 = 75°
,15*7 = 105°
,15*9 = 135°

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Answer 2

Let angles are 3x, 5x, 7x, 9x

We know that the sum of angles of an quadrilateral is 360°

Here,

3x + 5x + 7x + 9x = 360

24x = 360

$x = \frac{360}{24}$

x = 15°

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Angles are :-

3x= 3(15) = 45°
5x=5(15)=75°
7x=7(15)=105°
9x=9(15)=135°