Hitunglah keliling dan luas lingkaran jika diketahui panjang jari jari a.4cm b.6cm c.7cm

A. K= 2πr
=2.3,14.4
=25,12cm

L= πr²
=3,14.4²
=50,24 cm²

b.K= 2.3,14.6
=37,68 cm

L=3,14.6²
=113,04cm²

c.K=2.22/7.7
=44 cm

L= 22/7.7²
=154cm²