Zad. 10
a) Obw. = 7 cm + 6 cm + 15 cm + 2 cm + 8 cm + 4 cm = 42 cm
P = 7 cm * 6 cm + 8 cm * 2 cm = 42 cm² + 16 cm² = 58 cm²
b) Obw. = 3 * 5 dm + 3 dm + 4 dm = 15 dm + 3 dm + 4 dm = 22 dm
P = [tex](5 dm)^2 + \frac{1}{2} * 3 dm * 4 dm = 25 dm^2 + 6 dm^2 = 31dm^2[/tex]
Zad. 11
[tex]P_{I} = \frac{1}{2} * 8 * 6 = 4 * 6 = 24[/tex]
[tex]P_{II} = \frac{1}{2} * 3 * 4 = 3 * 2 =6[/tex]
[tex]P = P_{I} - P_{II} = 24 -6 = 18[/tex]
