Question

{42) рис.8.22(спасибо!

Answer 1

$S=2(ab+ac+bc)\\S=2(1cdot 1+1cdot 1+1cdot 2)=2cdot (1+1+2)=8\\S=2(1,5cdot 1,5+1,5cdot 1,5+1,5cdot 2)=2(2,25+2,25+3)=7,5$

Answer 2

и че