Asked by Erin

Suppose the parallelogram shown has angles defined by the following expressions: angle A = 6x + 19; angle B = 3x - 21; angle C = 6x + 19; and angle D = 3x - 21? What is the measure of the largest angle?
Answered by Steve
What do you know about parallelograms? These questions don't just come out of the blue, you know.

The angles add up to 360°. That is,

6x+19 + 3x-21 + 6x+19 + 3x-21 = 360
18x-4 = 360
x = 20.222°

6x+19 = 140.333
3x-21 = 39.666