Odpowiedź:
Zad 4
1. [tex]a^{2}+b^{2} = c^{2}[/tex]
[tex]6^{2} +8^{2} = x^{2}[/tex]
36+64= [tex]x^{2}[/tex]
[tex]x^{2}[/tex]= 100
x= [tex]\sqrt{100}[/tex]
x=10
6*2+8*2+10*2+12*3=12+16+20+36=84cm
2. [tex]a^{2}+b^{2} = c^{2}[/tex]
[tex]x^{2} +3^{2} = 5^{2}[/tex]
[tex]x^{2} + 9 = 25\\[/tex] |-9
[tex]x^{2} = 25-9\\[/tex]
[tex]x^{2} =[/tex] 16
x= [tex]\sqrt{16}[/tex]
x= 4
7*2+5*2+10*2+4*2+4*10= 14+10+20+8+40=72cm
Zad 5
1. 8*3*2+2*3=48+6=54cm
2. 15*4*2+ x*4= 200
120+x*4 = 200 |-120
4x= 80 | : 4
x=20m
3. x*6*2 + 20*6=180
12x+120= 180 |-120
12x=60 | :12
x= 5dm
4. 7*10*2+12*10= 140+120=260mm
