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- Luas persegi = 100 cm²
- Luas 3/4 lingkaran = 3/4 x 3.14 x 25 = 58.875 cm²
- Luas 1/4 lingkaran = 1/4 x 3.14 x 25 = 19.625 cm²
Jadi Luas yang diarsir = 139. 25 cm²
Keliling seluruhnya = jumlah semua sisi + kell 1/4 lingkaran + kell 3/4 lingkaran
jumlah semua sisi = 20 cm
kell 1/4 lingkaran = 3.14x 1/4 x 10 =7. 85 cm
kell 3/4 lingkaran= 3.14 x 3/4 x 10 =23.55 cm
Jadi keliling total = 51.4 cm