Question

Jawab lah pertanyaan berikut ini
Diketahui luas lingkaran 9.856 Cm2.Panjang jari-jari lingkaran . . .Cm.

Answer 1

Verified answer

Luas = 9.856 cm²
π.r² = 9.856 cm²
22/7 x r² = 9.856 cm²
r² = 9.856 cm² : 22/7
r² = 9.856 cm² x 7/22
r² = 448 cm² x 7
r² = 3.136 cm²
r = √3.136 cm²
r = 56 cm

maka panjang jari-jari lingkaran adalah 56 cm

Answer 2

Verified answer

L = 9.856 cm^2
r = .....???

L = phi × r^2
9.856 = 22/7 × r^2
r^2 = 9.856/(22/7)
r^2 = 9.856 × 7/22
r^2 = 68992/22
r^2 = 3136
r = V3136
r = 56 cm

Jadi panjang jari-jari lingkaran 56 cm