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titik potong diagonal alas dianggap O
OH = √(d²-(½d)²) = √(√(P²+P²))² -(½P)²)
H tegak lurus terhadap bidang ACF dengan garis FZ
Luas HOF = ½(d x d) =
LHOF = ½(OF x HZ) <-- (jaraf H ke bidang ACF)
=√(P²+P²) = d
titik potong diagonal alas dianggap O
OH = √(d²-(½d)²) = √(√(P²+P²))² -(½P)²)
H tgk lrus terhadap bidang ACF dengan garis FZ
L HOF = ½(d x d) =
L HOF = ½(OF x HZ) ⇔ (jaraf H ke bidang ACF)