Question

Find the value of x in the following quadrilateral.

Answer 1

Answer:

see below

Step-by-step explanation:

Because the sum of all angles in a quadrilateral is 360° we have:

90 + 101 + 12x + 3 + 9x - 2 = 360

21x + 192 = 360

21x = 168

x = 8°

Answer 2

Answer:

The value of x is 8.

Step-by-step explanation:

Given that total angles in a quadrilateral is 360°. So in order to find x, you have to add up all the angles together to make it equals to 360° :

$101 + 12x + 3 + 9x - 2 + 90 = 180$

$192 + 21x = 360$

$21x = 360 - 192$

$21x = 168$

$x = 168 \div 21$

$x = 8$