Odpowiedź:
1)
[tex] p = \frac{(16 + 14) \times 20}{2} = \frac{30 \times 20}{2} = 300cm {}^{2} [/tex]
2)
[tex]p = \frac{(16 + 27) \times 20}{2} = \frac{43 \times 20}{2} = 430 {m}^{2} [/tex]
3)
[tex]p = \frac{(4.3 + 5.7) \times 35}{2} = \frac{10 \times 35}{2} = 175 {cm}^{2} [/tex]
4)
[tex]p = \frac{(7 + 3) \times 0.5}{2} = \frac{10 \times 0.5}{2} = 2.5km {}^{2} [/tex]
5)
[tex]100 = \frac{(14 + 6) \times h}{2} \\ 200 = 20h \\ h = 10cm[/tex]
6)
[tex]150 = \frac{(22 + 28) \times x}{2} \\ 300 = 50x \\ x = 6cm[/tex]
proszę o naj :)
