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P=π4² P=π2²
P=16π P=4π 16π-4π=12
ODP. Pole jest wieksze o 12
b)
P=πr² P=πr²
P=π4² P=π(¼)²
P=16π P=¹/¹⁶π 16π-¹/₁₆π =15 ¹⁵/₁₆
ODP. o 15 ¹⁵/₁₆
c)
P=πr² P=π1²
P=π4² P=1π
P=16π 16π-1π=15
ODP. o 15