Odpowiedź:
[tex]P = \frac{(a + b) \times h}{2} [/tex]
POZIOM A
a)
[tex]P = \frac{(8 + 7) \times 10}{2} \\ P = \frac{15 \times 10}{2} \\ P = 15 \times 5 \\ P = 75[/tex]
b)
[tex] P\frac{(4.6 + 6.3) \times 4}{2} \\ P = (4.6 + 6.3) \times 2 \\ P = 10.9 \times 2 \\P = 21.8[/tex]
c)
[tex]P\frac{(5 + 9) \times 3}{2} \\ P = \frac{14 \times 3}{2} \\ P = 7 \times 3 \\ P = 21[/tex]
d)
[tex]P = \frac{(3 + 6) \times 7}{2} \\ P = \frac{9 \times 7}{2} \\ P = \frac{63}{2} = 31 \frac{1}{2} [/tex]
POZIOM B
a)
[tex]P = \frac{(4 + 2) \times 5}{2} \\P = \frac{8 \times 5}{2} \\ P = 4 \times 5 \\ P = 20[/tex]
b)P=(3.9+7.8) x 6/2
P=11.7 x 6/2
P = 11.7 x 3
P= 27.3
c) P=(9+15) x 8 /2
P=(9+15) x 4
P=24 x 4
P = 96
d)
[tex]P = \frac{(2.5 + 5.8) \times 2}{2} \\ P = 2.5 + 5.8 \\ P = 8.3[/tex]
POZIOM D
a)
P = (3+28) x 12 /2
P = (3+28) x 6
P = 31 x 6
P = 186
obwód
ob=3+28+20+15=31+35=66
