tolong jawab pake caranya ya 1-5 kalo bener aku ikuti dan kasi love

1. luas = Π x r x r (r= d : 2)
(3,14) 314/100 x 12cm x 12cm
45216cm² : 100
= 452,16cm²
2. luas = Π x r x r
(3,14) 314/100 x 6cm x 6cm
11304cm² : 100
= 113,04cm²
3. jari² = √ luas : Π
√ 314cm² : 314/100
√ 100cm
= 10cm
4. luas = Π x r x r
(3,14)
314/100 x 105/10cm(10,5) x 105/10cm(10,5)
= 3461,85cm²
5. luas = ¼ x Π x r x r
karna ¼ lingkaran
¼ x 22/7 x 7cm x 7cm
154cm² / 4
= 38,5cm²