tolong ya kak, pakai cara. 7,8&9 . thx before :)

7. Kel lingkaran = 22/7×42m = 132 m
Banyaknya pohon = keliling÷3
= 132÷3 =44 buah (B)

8. = K + n(d)
22/7×14 + 6×14
44+84
Jawab = C

9. Luas = 3,14×r2= 78,5
r2 = 78,5÷3,14 =25
r = 5 cm
Keliling = 3,14×d
= 3,14 ×10
= 31,4 cm (no2)
Jawab = B
Semoga membantu