Odpowiedź:
1. - 26cm
2. - 27cm
Szczegółowe wyjaśnienie:
1.
[tex]P = a * b = 7cm * 3cm = 21cm\\P = \frac{a*h}{2} = \frac{2cm*2cm}{2} = \frac{4cm}{2} = 2cm\\P = \frac{a*h}{2} = \frac{3cm*2cm}{2} = \frac{6cm}{2} = 3cm\\P = 21cm + 2cm + 3cm = 26cm[/tex]
2.
[tex]P = a*b= 7cm * 5cm = 35cm\\P = \frac{(a+b)*h}{2} =\frac{(7cm+1cm)*2cm}{2} = \frac{8cm*2cm}{2}= \frac{16cm}{2}= 8cm\\P = 35cm - 8cm = 27cm[/tex]
