Tangent lines and chord properties

What you'll learn

1. Identify and apply the tangent-radius perpendicularity property to find unknown lengths and angles
2. Use the theorem that two tangent segments from the same external point are congruent
3. Calculate the distance from a circle's center to a chord using the perpendicular bisector relationship
4. Apply chord-chord relationships, including the intersecting chords length theorem

Prerequisites

• Equation of a circle (standard form, completing the square)