Mathematics, 25.10.2019 06:43 01moxberger

Prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3), j(0,1) is a rectangle

parallelogram method:
rectangle method:

i need understanding how to prove it's a rectangle

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Prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3), j(0,1) is a rectangle

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