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=3,14×20×20
= 1256 cm²
keliling lingkaran = phi×d
= 3,14 × 40
= 125,6 cm
π = 3.14
Ditanyai : - Luas Lingkaran = ?
- Keliling Lingkaran = ?
Jawab :
- Luas Lingkaran = π
= 3.14*
= 3.14*400
= 1256 cm
- Keliling Lingkaran = π*d
= 3.14*40
= 125.6 cm