tolong jawab ya jam 7 dikumpulkan, jangan ngasal kak....
![](https://id-static.z-dn.net/files/dd2/986d63a7b7389237245ed71d15b24f5f.jpg)
Jawaban:
1. Luas COD = 72°/360° x Luas lingkaran
= 1/5 x 3,14 x 20 x 20
= 1/5 x 1256
= 251,2 cm²
2. Luas TOU = 150°/360° x Luas lingkaran
= 5/12 x 3,14 x 36 x 36
= 5/12 x 4069,44
= 1695,6 cm²
3. Luas ROS = 45° / 360° x luas lingkaran
= 1/8 x 22/7 x 28 x 28
= 1/8 x 2464
= 308 cm²
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