Байарыст 2018-1 №4 вариант 9

Bayarystanov A.O. 2018-1 work №4 option 9
Pyramids of the Table A(9;2;6); B(–6;–2;3); C( –3 ;1;–4 ); D(4;5;–-7) berilgen. Taboo kerek: a)|AB|; b) BC; BD; c) S ABC ; d) V ABCD.

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