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* Mencari jarak PC
PC = ½ diagonal bidang
= ½ √8² + 8²
= ½ √128
= ½ • 8√2
= 4√2 cm
* Mencari jarak GP
Jarak GP merupakan jarak titik G ke garis BD
GP = √GC² + CP²
= √8² + (4√2)²
= √64 + 32
= √96
= √16 x 6
= 4√6 cm
Jadi, jarak titik G kegaris BD adalah 4√6 cm