on a coordinate grid wgat is the horizontal and the vertical line called... I just cant bother to look in my notes
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It is better to illustrate the problem. As you can see on the figure, angle A and angle C are opposite angles. First, we define parallelogram. Parallelogram is a quadrilateral with two sets of parallel sides. Moreover, the opposite sides and the opposite angles are equal.
From the definition alone, there is no need to solve. Angle C = Angle A = 55 °.
From the definition alone, there is no need to solve. Angle C = Angle A = 55 °.