a)
Pole prostokąta
[tex]a \times b = 10 \times 6 = 60 {cm}^{2} [/tex]
Pole trójkąta
[tex] \frac{a \times h}{2} = \frac{2 \times 4}{2} = \frac{8}{2} = 4 {cm}^{2} [/tex]
Zatem figura ma
[tex]60 - 4 = 56 {cm}^{2} [/tex]
b)
Pole trójkąta
[tex] \frac{a \times h}{2} = \frac{8 \times 5}{2} = \frac{40}{2} = 20 {cm}^{2} [/tex]
Pole prostokąta
[tex]1.5cm = 15mm \\ \\ a \times b = 15 \times 5 = 75m {m}^{2} = 7.5 {cm}^{2} [/tex]
Zatem figura
[tex]20 -7.5 = 12.5 {cm}^{2} [/tex]
c)
Pole kwadratu
[tex] {a}^{2} = {6}^{2} = 36 {cm}^{2} [/tex]
Pole trójkąta
[tex] \frac{a \times h}{2} = \frac{6 \times 2}{2} = \frac{12}{2} = 6 {cm}^{2} [/tex]
Zatem figura
[tex]36 - 6 = 30 {cm}^{2} [/tex]
Myślę że pomogłem ;)
