Задача Задача №654142
А
А
- S = 2(а×в+в×с+а×с) = 2(а×4+4×5+а×5) = 2(4а+20+5а) = 18а+40
- S = 2(а×в+в×с+а×с) = 2(а×6+6×40+а×5) = 2(6а+24+5а) = 22а+48
- S = 2(а×в+в×с+а×с) = 2(а×20+20×4+а×5) = 2(20а+80+5а) = 25а+160
- S = 2(а×в+в×с+а×с) = 2(а×8+8×9+а×9) = 2(8а+72+9а) = 34а+72
