zad. 7
3x+x=16
4x=16 /4
x=4
3x=12
P = 1/2 * 4 * 12 = 2*12 = 24 cm2
odp.
B-D
zad. 8
kwadrat = 2*2 = 4cm2
trójkąt = 1/2 * 6 * 3 = 3 * 3 = 9cm2
Pc = 4 + 9 = 13 cm2
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zad. 7
3x+x=16
4x=16 /4
x=4
3x=12
P = 1/2 * 4 * 12 = 2*12 = 24 cm2
odp.
B-D
zad. 8
kwadrat = 2*2 = 4cm2
trójkąt = 1/2 * 6 * 3 = 3 * 3 = 9cm2
Pc = 4 + 9 = 13 cm2