Current Data About
coplanarity
(P31) |
(Q63344712)
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(P1889) |
(Q1419761)
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(P2534) |
(x_3 - x_1) \cdot [(x_2 - x_1) \times (x_4 - x_3)] = 0
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(P6104) |
(Q8487137)
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