Need proof that abcd is a parallelogram

Step-by-step explanation:

To prove that two sides are parallel on a graph, we must show that their slopes are the same. Plotting this on Desmos, we get the first image attached.  Finding the slopes of each line, we get

As the top slope is the same as the bottom, and the right is the same as the left, this is a parallelogram.

To prove that two sides are congruent, we must find their lengths. The distance formula is

Finding the distances, we get

TOP:

BOTTOM:

RIGHT:

LEFT:

As the lengths are the same, the sides are congruent

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step-by-step explanation:

answer: for each 3 girls there is 2 boys . 3: 2

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