Regents Geometry Flashcards
Tangents are congruent when (given no outside information)
They are drawn from the same external point.
Secant-secant rule
Exsec x sec = exsec2 x sec
Tangent-tangent angle
Half the difference of arcs
Internal tangents exist when
The area inside two circles share less than epsilon.
The segments of two intersecting chords
A x b = c x d
Inscribed angle of an arc measures
Half the measure of the intercepted arc.
Chord-chord angle
Half the sum of arcs
Define circumcenter.
Point of concurrence of the perpendicular bisectors.
Inverse of a conditional
A-)b–):a-):b
Secant-tangent rule
Exsec x sec : tan!2
Define incenter.
Point of concurrence of angle bisectors.
H, L combinations
Congruence
Tangent-secant angle
Half the difference of arcs.
Define centroid.
Point of concurrence of the medians.
ASA
Congruence