Байарыст 2018-1 №4 вариант 3

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

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