No 2 apasihh coba di Kasih tau plisee help mee

A. r = d/2 = 84/2 = 42
b. k= 2.d = 2.84 = 168
c. l= phi.r^2 = 22/7.42.42
=5544
semoga membantu ^^

A.jari-jari
=84 cm /2
=42cm

b.keliling
=2× phi ×jari jari
=2×22/7×42cm
=264cm

c.luas
=phi x jari jari xjari jari
=22/7x42cmx42cm
=5544cm kuadrat