Keliling = 2πr
132/2 = 22/7 × r
66 = 22/7 × r
r = 66 × 7/22
r = 3 × 7
r = 21cm
Luas
= πr²
= 22/7 × 21²
= 22/7 × 441
= 22 × 63
= 1.386cm²
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Keliling = 2πr
132/2 = 22/7 × r
66 = 22/7 × r
r = 66 × 7/22
r = 3 × 7
r = 21cm
Luas
= πr²
= 22/7 × 21²
= 22/7 × 441
= 22 × 63
= 1.386cm²