Tolong bantu hitung luas tembereng ya :)​

Mapel : MATEMATIKA

Lt = Lj AOB – L segitiga AOB
=( 90/360 ×22/7×21²) – (21 × 21 /2)
= (1/4 × 22×21×3) – (220, 5)
= 346,5 – 220, 5
=126 cm

Semoga membantu,,