Luas Permukaan Setengah Bola adalah!!....
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Jawaban:
Luas permukaan 1 bola = 4 π r²
Luas 1/2 bola = 1/2 × 4 π r²
= 2 π r²
Luas 1/2 bola padat (pejal) = L 1/2 bola + L tutup alas
= 2 π r² + π r²
= 3 π r²