Question

1-8 задачи
помогите пожалуйста!

Answer 1

1)
$km = \frac{1}{2} ab$
$km = 3.5$

2)
$nr = 2ef$
$nr = 7 \times 2 = 14$

3)
$rt = \frac{1}{2} (ad + bc)$
$rt = (6 + 3) \div 2 = 4.5$

4)
$xy = (ab + bc) \div 2$
$6 = (3 + ad) \div 2$
$3 + ad= 12 \\ ad= 9$
5)
$ac = 2xy \\ ac = 2 \times 4 = 8$
6)
$bc = 3 \times 2 = 6 \\ ac = 2 \times 2 = 4 \\ ab = 2.5 \times 2 = 5 \\ p = 6 + 4 + 5 = 15$
7)
$rp = 7 \div 2 = 3.5 \\ kp = (7 + 3) \div 2 = 5 \\ kr = 5 - 3.5 = 1.5$
8)
$mr = \frac{1}{2} ad \\ mr = 16 \div 2 = 8$