SOLUTION: need to find the measure of the fourth angle in each quadrilateral 90 degrees, 50 degrees, 48 degrees, x X equals what?

Question 845210: need to find the measure of the fourth angle in each quadrilateral
90 degrees, 50 degrees, 48 degrees, x
X equals what?
Answer by pmesler(52) (Show Source): You can put this solution on YOUR website!
To begin you should know that the sum of all the angles in a quadrilateral = 360 degrees.
Now that we know that the sum is 360 and we know the other three angles, it will be easy to solve for x.
90 + 50 + 48 + x = 360.
188 + x = 360.
Subtract 188 from both sides to simplify and isolate x.
x = 172. Therefore x is 172 degrees.
Now let's check to see if this is correct
90 + 50 + 48 + 172 = 360
360 = 360. It checks out. The problem is solved.
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