External×Whole=External×Wholecap E x t e r n a l cross cap W h o l e equals cap E x t e r n a l cross cap W h o l e
The part of the secant that lies outside the circle. 10-5 additional practice secant lines and segments
[ a \cdot b = c \cdot d ]
: The angle measure is half the sum of the intercepted arcs. External×Whole=External×Wholecap E x t e r n a
Usually, this involves a simple linear equation, though occasionally you may need to solve a quadratic. Summary Table for Quick Reference Relationship Two Chords (Inside) Two Secants (Outside) Secant & Tangent Tangent Squared By focusing on the Outside this involves a simple linear equation