keliling sebuah lingkaran 88 cm. luasnya adalah....

K = π x d
88 = 22/7 x d
88 x 7 = 22 x d
616 = 22 x d
28 = d
14 = r
____________
L = π x r²
L = 22/7 x 14 x 14
L = 22 x 2 x 14
L = 616 cm²

Semoga Bermanfaat

Keliling

= π × d

= 88 cm

Diameter

= 88 cm : π

= 88 cm : 22/7

= 88 cm × 7/22

= 28 cm

Jari jari

= 28 cm : 2

= 14 cm

Luas

= π × r × r

= 22/7 × 14 cm × 14 cm

= 616 cm2