" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
L ⬜ dalam = 12 × 10 = 120
L ⬜ luar = 11 × 13 = 143
143 - 120 = 23 m²
no.2
keliling ⭕ = π × d
d = 18 × 2 = 36
3,14 × 36 = 113,04
karena berputar 2 kali maka
113,04 × 2 = 226,08 meter
semoga membantu ^^