Reach for the Summit - M-S7-A1

Geometry Level pending

If point A,B,C,DA,B,C,D are in the 3D3D space, ABC=BCD=CDA=DAB=90°\angle ABC = \angle BCD = \angle CDA = \angle DAB = 90 \degree, is it always true that A,B,C,DA,B,C,D are on the same plane?


Reach for the Summit problem set - Mathematics

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