Question

нудно сделать букву (а)​

Answer 1

$s= \frac{1}{2} ah = \frac{1}{2} \times 15 \times 16 = \\ 15 \times 8 = 120 \: \: cm {}^{2} \\ \\ 120 = \frac{1}{2} \times 20 \times h \\ 10h = 120 \\ h = 120 \div 10 \\ h = 12 \: \: cm$