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Ditanya: panjang diagonal ruang
Penyelesaian:
Cari terlebih dahulu diagonal bidang
= √9² + 9²
= √81 + 81
= √162
= √9 × √18
= 3√18
Diagonal ruang
= √9² + 3√18²
= √81 + 9 × 18
=√81 + 162
= √243
=√81 × √3
= 9√3
Maaf kalo salah