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R = 2r = 2*4cm = 8cm
A = πr²
Atotal = πr² + (1/2)πR²
A no sombreada = (1/2)πR² = (1/2)π(8cm)²
A no sombreada = 32π cm²
Oie zy! 7.7 Pasa el pack de esa elfa rikolina bro!