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Mapel Math
Bab Kesebangunan

Penyelesaian :
1). Keliling lingkaran
= 2 × phi × r
= 2 × 22/7 × 56 cm
= 44/7 × 56 cm
= 352 cm

2). Luas lingkaran
= phi × r^2
= 3,14 × 10 cm × 10 cm
= 314 cm^2

3). a). Jari jari
Keliling lingkaran = 2 × phi × r
2 × 22/7 × r = 198 cm

r = 198 cm ÷ (2 × 22/7)
r = 198 cm ÷ 44/7
r = 198 cm × 7/44
r = 31,5 cm

b). Diameter
= r × 2
= 31,5 cm × 2
= 63 cm

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