Jawaban:
Jari-jarinya
= ½ × diameter
= ½ × 28
= 14 cm
Luas Lingkaran
= π × r × r
= 22/7 × 14 × 14
= 22 × 2 × 14
= 44 × 14
= 616 cm²
Luas setengah lingkaran
= ½ × luas lingkaran
= ½ × 616
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Jawaban:
Jari-jarinya
= ½ × diameter
= ½ × 28
= 14 cm
Luas Lingkaran
= π × r × r
= 22/7 × 14 × 14
= 22 × 2 × 14
= 44 × 14
= 616 cm²
Luas setengah lingkaran
= ½ × luas lingkaran
= ½ × 616
= 308 cm³ (b)