Question

1.
The angles of quadrilateral are in the ratio 3:5:9:13. Find all the angles of the
quadrilateral.
If the diagonals of a narallelogram are equal, then show that it is a rectangle.​

Answer 1

Answer:

let the angles be 3x,5x,9x,13x

we know that sum of all angles of quadrilateral is 360 then

3x+5x+9x+13x=360

30x=360

x=360/30

x=120/10

x=12

now all angles are 3×12=36

5×12=60

9×12=144

13×12=156