Hitunglah luas dan keliling bangun yang diarsir diatas​

Jawaban:

L = S² – πr²

L = 1.681 – 3,14 × 20,5²

L = 1.681 – 3,14 × (20,5 × 20,5)

L = 1.681 – 3,14 × 420,25

L = 1.681 – 1.319,585

L = 361,415 cm²

K = πd

K = 3,14 × 41

K = 128,74 cm

Keterangan =

L = Luas arsir

K = Keliling

π = phi (22/7 & 3,14)

r = jari-jari