6Δabc\frac{6 \Delta}{a b c}abc6Δ
4Δa2b2c2\frac{4 \Delta}{a^{2} b^{2} c^{2}}a2b2c24Δ
Δabc\frac{\Delta}{a b c}abcΔ
4Δ2ab\frac{4 \Delta}{2 a b}2ab4Δ