plis jawab gunakan cara kerja

[tex]r = 21m \\ l = \pi \times r \times r \\ l = \frac{22}{7} \times 21 \times 21 \\ l = 1386 {m}^{2} [/tex]
Maaf kalo salah, semoga membantu

r = 21 m
Luas lingkaran = TTr2
TT = 22/7
L = 22/7 × 21 × 21
= 9.702/7 = 1.386 m2
MAAF KALO SALAH