tolong gan soal MTK ku

4.
Penyelesaian:
Diket.:
α = 108°
r = 14 cm
Ditanya:
Panjang busur PQ = ....?
Luas juring PQ = ....?
Jawab:
Panjang busur PQ
= α/360° × 2πr
= 108°/360° × 2 × 22/7 × 14
= 3/10 × 616/7
= 3/10 × 88
= 264/10
= 26,4 cm

Luas juring PQ
= α/360° × πr²
= 108°/360° × 22/7 × 14²
= 3/10 × 22/7 × 196
= 12.936/70
= 184,8 cm²

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