Jawabanmu

2014-09-02T22:14:18+07:00
Luas Lingkaran 2 x pi x r
2x3,14x10 = 62,8
2014-09-02T22:14:53+07:00
L =  \pi

Diameter = 2 r (jari-jari)
r = 10

 \pi = 3.14

L = 3.14 x 10 x 10 = 314

Semoga dapat terbantu :)
r=10
iya
r=10,
Luas=3.14XrXr=3.14X10X10
=314