Tolong ya sama caranya... makasih.... Note : kalo gk keliatan di zoom ya

Luas juring: L 1/4 O = 1/4 × πr²
= 1/4 × 3,14 × 20 × 20
= 314 cm²
Luas ∆ = a×t /2
= 20×20 /2
= 400/2
= 200 cm²
Luas tembereng = L juring - L ∆
= 314 cm² - 200 cm²
= 114 cm²