Tolong jawab nomor 1 sampai 5 ya. Saya blm faham. Sblmnya Terima kasih yg sudah menjawab pertanyaan d atas

1. K = 2 × phi × r


396 = 2 × 22/7 × r

396 = 44/7 × r

r = 396 ÷ 44/7

r = 396 × 7/44

r = 9 × 7

r = 63



3. L = Phi × r^2

1.256 = 3,14 × r^2

r^2 = 1.256 ÷ 3,14

r^2 = 400 (diakarkan pangkat 2)

r^2 = 20^2



4. K = 2 × phi × r

44 = 2 × 3,14 × r

44 = 6,28 × r

r = 6,28 ÷ 44

r = 0,14


K = 2 × phi × r

616 = 2 × 22/7 × r

616 = 44/7 × r

r = 616 ÷ 44/7

r = 616 × 7/44

r = 14 × 7

r = 98