Question

diameter sebuah lingkaran 28 cm. luas lingkaran tersebut adalah..........cm²​

Answer 1

r = d : 2 = 28 : 2 = 14

Luas lingkaran

[tex]\pi \times r \times r \\ \frac{22}{7} \times 14 \: cm \times 14 \: cm \\ 616 \: {cm}^{2} [/tex]

Answer 2

R = 28/2 = 14

MAKA :

L = πR²

= 22/7(14)²

= 22/7(14(14)

= 22/7(196)

= 22(196/7)

= 22(28)

= 616 CM²