ananurh
A. diameter = 2 x r 14 = 2 r r = 14/2 = 7 K = π x d = 22/7 x 14 =44 cm L = π r² = 22/7 x 7² = 22/7 x 49 =154 b. K = 2 X π X r = 2 x 22/7 x 20 = 125,7 L = 22/7 x 20² =1257,1 c. r = 30/2 =15 K = π x d = 22/7 x 30 = 94,2 L = π r² = 22/7 x 15² = 707,1 d. K = 2 X π X r = 2 x 22/7 x 21 = 132 L = 22/7 x 21² =1386
nnti di kali ulang ya de, jangn smpe ada yang keliru
14 = 2 r
r = 14/2 = 7
K = π x d = 22/7 x 14 =44 cm
L = π r² = 22/7 x 7² = 22/7 x 49 =154
b. K = 2 X π X r = 2 x 22/7 x 20 = 125,7
L = 22/7 x 20² =1257,1
c. r = 30/2 =15
K = π x d = 22/7 x 30 = 94,2
L = π r² = 22/7 x 15² = 707,1
d. K = 2 X π X r = 2 x 22/7 x 21 = 132
L = 22/7 x 21² =1386
nnti di kali ulang ya de, jangn smpe ada yang keliru