Keliling sebuah lingkaran 88 cm maka luas lingkaran adalah

Keliling lingkaran
= Phi × diameter

Diameter
= 22/7 ×.... = 88 cm
= 7/22 × 88 cm
= 28 cm

Jari jari = 28 cm ÷ 2 = 14 cm


Luas lingkaran
= Phi × r²
= 22/7 × 14 cm × 14 cm
= 616 cm²





Semoga membantu ^^
Maaf kalau salah

K = 2 x phi x r
88 = 2 x 22/7 x r
88 = 44r/7
88*7 = 44r
616 = 44r
r = 616/44 = 14 cm

L = phi x r^2
L = 22/7 x (14)^2
L = 22/7 x 196
L = 22 x 28
L = 616 cm^2