carilah luas bangun diatas

4. LI = 3/4 × π × r × r
= 3/4 × 22/7 × 14 × 14
= 462 cm2
LII = 1/2 × a × t
= 1/2 × 14 × 14
= 98 cm2
L total = LI + LII
= 462 + 98
= 560cm2
5. LI = d1 × d2 ÷ 2
= 35 × 14 ÷ 2
= 245 cm2
LII = π × r × r
= 22/7 × 17.5 × 17.5
= 962.5 cm2
L arsir = LII - LI
= 962.5 - 245
= 717.5 cm2