Odpowiedź:
[tex]1. \: a = 4 \frac{1}{2} cm = 4.5cm \\ h = 2cm \\ P = \frac{ah}{2} = \frac{4.5 \times 2}{2} = \frac{9}{2} = 4.5 {cm}^{2} [/tex]
[tex]b) \: e = 6dm + 6dm = 12dm \\ f = 6dm + 6dm = 12dm \\ P = \frac{ef}{2} = \frac{12 \times 12}{2} = \frac{144}{2} = 72 {dm}^{2} [/tex]
[tex]c) \: a = 4.5m \\ h = 2.6m \\ P = ah = 4.5 \times 2.6 = 11.7 {m}^{2} [/tex]
