Найдите координаты середин диагоналей четырёхугольника ABCD, если А(-3; -2; 4), B(-7; 9; -5), C(-13; 16; — 1), D(-9; 5; 5). Определите вид четырёхугольника ABCD.

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.