16. Perhatikan gambar! Luas tembereng adalah a. 28,5 cm² b. 38,5 cm² c. 39,25 cm² d. 52,33 cm² bantuin dong nomer 16 pliss

r = 10 cm

L = (1/4 × phi x r^2) - (1/2 × r^2)
= (1/4 × 3,14 × 10 × 10) - (1/2 × 10 × 10)
= 78,5 - 50
= 28,5 cm^2 (a)