1.
[tex]36 = 4 \times b \\ b = 9[/tex]
Obwód
[tex]4 + 4 + 9 + 9 = 8 + 18 = 26[/tex]
2.
x - jeden bok
3x - drugi bok
[tex]x + 3x + x + 3x = 64 \\ 8x = 64 \\ x = 8[/tex]
Zatem
bok pierwszy ma 8
bok drugi ma 8 × 3 = 24
3.
[tex]a \times h = 6.2 \times 6.3 = 39.06[/tex]
4.
[tex] \frac{e \times f}{2} = \frac{10 \times 8}{2} = \frac{80}{2} = 40[/tex]
5.
[tex]10 = 8 \times h | \div 8 \\ h = \frac{10}{8} = 1 \frac{2}{8} = 1 \frac{1}{4} = 1.25[/tex]
6.
[tex] \frac{(a + b) \times h}{2} = \frac{(8.4 + 12.4) \times 3.6}{2} = \frac{20.8 \times 3.6}{2} = \frac{74.88}{2} = 37.44[/tex]
7.
[tex]160 = \frac{(4.5 + 11.5 ) \times h}{2} | \times 2 \\ 320 = (4.5 + 11.5) \times h \\ 320 = 16h | \div 16 \\ h = 20[/tex]
Myślę że pomogłem ;)
