Obwód = 2a + 2b
24cm = 2*8cm + 2b
24cm = 16cm + 2b
24cm - 16cm = 2b
2b = 8cm /:2
b = 4cm
P = a * b
P = 8cm * 4cm
P = 32
8cm + 0,8cm = 8,8cm
P = 4cm * 8,8cm
P = 35,2
35,2 - 32 = 3,2
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Obwód = 2a + 2b
24cm = 2*8cm + 2b
24cm = 16cm + 2b
24cm - 16cm = 2b
2b = 8cm /:2
b = 4cm
P = a * b
P = 8cm * 4cm
P = 32
8cm + 0,8cm = 8,8cm
P = 4cm * 8,8cm
P = 35,2
35,2 - 32 = 3,2