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p=1050cm²
Obw=170 cm
2.
a=64/4
a=16
Obw=48m
3.
a=2 km
obw=5 km
4.
b=25m
Obw=100m
5.
b=13cm
p=169m²
Pp=a*b
Pp=70*15=1050j^
Ob=2*a+2*b
Ob=2*70+2*15
Ob=170j^
Ad.2
64:4=16
Ob=2*16+2*4
Ob=40m^
Ad.3
1km:0,5km=2km
Ob=2*2+2*0,5
Ob=4km
Ad.4
625:25=25
Ob=2*25+2*25
Ob=100m^
Ad.5
52:13=4
Ob=2*13+2*4
Ob=34cm^
Liczę na najj:)
a = 70 cm
b = 15 m = 1500 cm
P = a × b
P = 105000 cm² = 10,5 m²
Ob= 2a + 2b
Ob= 140 + 3000
Ob= 3140 [cm] = 31,4 [m]
Zad.2
a = ?
b= 4 m
P= a × b
64m² = a × 4 m / : 4m
16m = a
Ob= 2a + 2b
Ob= 8 + 32
Ob= 40 [m]
Zad.3
a = ?
b= 0,5 km
P = a × b
1 km² = a × 0,5 km / : 0,5 km
2 km = a
Ob= 2a + 2b
Ob= 4 + 1
Ob= 5 [km] = 5000 [m]
Zad.4
a =25 m
b = ?
P= a × b
625 m² = 25 m × b / :25 m
25 m = b
Ob= 2a + 2b
Ob= 50 + 50
Ob= 100 [m]
Zad.5
a =13 cm.
b= ?
Ob= 2a + 2b
52 cm = 26 cm+ 2b
26 cm = 2b /:2
13 cm = b
P= a × b
P= 13 × 13
P= 169 [cm²]