D = 21 cm
R =
π =
Luas lingkaran
L = π r²
=
= 11 × 3 ×
= 346,5
Lingkaran
d = 21 Cm
r = d ÷ 2 = 21 ÷ 2 = 10.5
Luas?
L = πr²
L = 3.14 x 10.5 x 10.5
L = 32.97 x 10.5
L = 346.185 Cm²
Jadi, Luas lingkaran tsb. adalah 346.185 Cm²
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dik :
D = 21 cm
R =
π =
dit :
Luas lingkaran
jawab :
L = π r²
=
= 11 × 3 ×
= 346,5
Lingkaran
d = 21 Cm
r = d ÷ 2 = 21 ÷ 2 = 10.5
Luas?
L = πr²
L = 3.14 x 10.5 x 10.5
L = 32.97 x 10.5
L = 346.185 Cm²
Jadi, Luas lingkaran tsb. adalah 346.185 Cm²