tolong jawab ya pless nomor 15 dan 16 besok dikumpulkan

15.
L = ¾ × Π × r²
= ¾ × 3,14 × 10²
= ¾ × (3,14 × 100)
= ¾ × 314
= 235,5 cm²
.
16.
L = 5 × luas persegi
= 5 × s²
= 5× 5²
= 5×25 = 125 cm²