Hitunglah luas lingkaran, Jika jika diameternya: a. 48 cm b. 63 cm

a.
r = ½ × d = ½ × 48 cm = 24 cm
L = πr²
L = 3,14 × 24 × 24
L = 75,36 × 24
L = 1.808,64 cm²

b.
L = ¼πd²
L = ¼ × 22/7 × 63 × 63
L = ¼ × 22 × 9 × 63
L = ¼ × 198 × 63
L = ¼ × 12.474
L = 3.118,5 cm²

Maaf Kalau Salah

48=3.14×48×48 =7,234,56
63=22/7×63×63
63:7=9×22×
=12,474