Question

Calculati aria discului cu raza de:

A)10 cmB)3 pe 4 cm 

Answer 1

A disc = $2 \pi *R =\ \textgreater \ a ) A .disc= 2*10 \pi =20 \pi cm^2 ; b ) \frac{2*3}{4} \pi = \frac{6}{4} \pi = \frac{3}{2} \pi cm^2$