tolong jawab ya Kakak kakak brainly

a.luas=phi ×r^2
=22/7 ×14^2
=22/7 × 196
=616 cm^2
b.luas =phi ×r^2
=3,14 ×20^2
=3,14 × 400
=628 cm^2
c.luas =phi×r^2
=22/7×35^2
=22/7×1225
=3850 cm ^2

d.luas=phi ×r^2
=22/7 × 7^2
=22/7 × 49
=154 cm^2
e.luas=phi ×r^2
=3,14 ×10^2
=314 cm ^2
f.luas =phi ×r^2
=22/7 × 21^2
=22/7 × 441
= 1386 cm^2