Байарыст 2018-1 №4 вариант 1

Bayarystanov AO 2018-1 work №4 options 1
The ceilings of the pyramid A (2; 4; 5); B (1; 3; 7); C (–2; –3; 6); D (9; –6; –8) is given. It is necessary to find: a) | AB |; b) BC; BD; c) S ABC; d) V ABCD.

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