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→ t = √(s² - r²)
Cari jari jarinya (r) menggunakan keliling
Keliling alas (berbentuk lingkaran ) :
→ K = 2πr
→ r = K / 2π
Jadi rumusnya :
t = √(s² - r²)
t = √[s² - (K / 2π)² ]
Ket :
r = Jari Jari
t = tinggi
s = garis pelukis
K = keliling