Question

20) In a quadrilateral measures of angles be(3x),(5x).(7x)and (9x) then the value of x is
a) 20
b) 15
c) 25
d) 10​

Answer 1

Answer:

b.15

Step-by-step explanation:

5x+7x+3x+9x=360°

24x=360°

x=15

Answer 2

We know that sum of all angles of a quadrilateral is 360°

so ,

3x + 5x + 7x + 9x = 360°

8x + 16x = 360°

24x = 360°

x = 360/24

x = 180/12

x = 30/2

x = 15

so answer is 15°