exam Maths Puzzle Numerical Ability

The measure of a complement of an angle is three more than twice the measure of the angle. What are the measures of the angle and its complement?

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exam Other Question

Use the concept of slope to determine if the given figure is a parallelogram or a rectangle.

I do not understand how to determine this. I have a picture but I cannot paste it here. Can you help me with understanding the concept? x+2/x-2=4/8