So I took a state test today and I'm not sure if I messed up or if I will get partial credit for my work, but here goes. We had to prove a quadrilateral was a rectangle and I showed that all the adjacent slopes were negative reciprocal giving it all right angles. IS THAT ENOUGH? Did I have to show it was a parallelogram first?
2026-05-05 17:16:37.1778001397
Coordinate proof of a rectangle
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That is correct.
The right angle information shows that the alternating side are parallel, which shows that is is a parallelogram.
The right angle info shows that it is a rectangle.