7. Oblicz pola rombów przedstawionych na rysunkach.

a) [tex]P = \frac{1}{2} * e * f[/tex]
e = 3
f = 6
P = [tex]\frac{1}{2} * 3 * 6 = 9[/tex]
b) P = a * h
a = 5
h = 4
P = 5 * 4 = 20
c) [tex]P = \frac{1}{2} * e * f[/tex]
e = 4
f = 7
P = [tex]\frac{1}{2} * 4 * 7 = 14[/tex]