Resposta :
R -> 111,27375 cm²
a = πr²
a = 3,14 . 6²
a = 3,14 . 36
a = 113,04 cm²
a = 3,14 . 0,75²
a = 3,14 . 0,5625
a = 1,76625 cm²
113,04 - 1,76625 = 111,27375 cm²
R -> 111,27375 cm²
a = πr²
a = 3,14 . 6²
a = 3,14 . 36
a = 113,04 cm²
a = 3,14 . 0,75²
a = 3,14 . 0,5625
a = 1,76625 cm²
113,04 - 1,76625 = 111,27375 cm²