Hitunglah luas lingkaran berikut. Tolong dijawab ya kak.

tak kasih contoh no 7
phi x r x r
3,14 x 32,5 x 32,5 = 3316,625
32,5 = 75/2

7. L= 1/4x3,14x75x75
=1/4x17662,5
= 4415,625
8. L= 1/4 x3,14x60x60
=1/4x11304
=2826
9. L= 1/4 x3,14x92x92
= 1/4 x26576,96
=6.744,24
10. L= 1/4x3.14x100x100
=1/4x31400
=7850