Question

Find the value of x
73°
109°

Answer 1

x = 88

Explanation:

To find the value of x, we know that the sum of a quadrilateral's exterior angles are 360. We can use this information to create an algebraic expression and solve for x.

`x+73+90+109=360`

Add like terms

`x+272=360\\`

Subtract 272 on both sides

`x=88`

To prove our work, we can add up all the angle measures and see if they add up to 360.

`88+73+90+109=360`

So, our work is correct.