# Parabola

Parabola Theorem: Three normal can be drawn from a point (x₁, y₁) to the parabola y² = 4ax. If the normal at t₁ and t₂ to the parabola y² = 4ax meet on the parabola, then t₁t₂ = 2. Proof: Let the normal at t₁ and t₂ meet at t₃ on the parabola The equation Read more about Parabola[…]