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
Define orthocenter.
Point of concurrence of altitudes.
SAS
Congruence
Tangent-chord angle
Half the intercepted arc
SSA
Hoax
Given circumcenter M, centroid B, and orthocenter G, what is the correct distance and order of the Euler line?
MB-2-G
SSS postulate
Congruence
Converse of a conditional
A-)b–)b-)a
Contrapositive of a conditional
A-)b–):b-):a
AAA
Similarity
AAS
Congruence
Similarity
SAS