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Ch.1-6 Definitions

undefined terms point, line,plane
adjacent angles nonoverlapping angles that share a vertex and side
counterexample an example that meets the definition but isn't what it's describing
skew lines non-coplanar lines that don't intersect
vertical angles non adjacent angles formed by intersecting lines
polygon a closed figure in a plane, connecting line segments endpt. to endpt., each segment intersects two others
quad. 4 sided polygon with atleast one pair of congruent sides
undecagon 11 sided polygon
regular polygon all angles and sides congruent
right triangle triangle with one right angle
acute triangle all angles are acute
obtuse triangle only one obtuse angle
isc. triangle atleast 2 congruent sides
trapezoid quadrilateral w/ exactly one pair of parallel lines
isc. trapezoid non parallel sides are congruent
kite quad with 2 pairs of consecutive congruent sides
parallelogram quad. with both pairs of sides parallel
rhombus pgram w/ all congruent sides
rectangle pgram w/ 4 right angles
square pgram w/ 4 right angles & all congruent sides
circle set of pts on a plane that have a radius & a center pt
congruent circles same radius
concentric circles circles that share the same center
minor arc arc smaller than a semicircle
major arc arc bigger than a semicircle
geometry a way to measure earth
inductive reasoning based on experience
deductive reasoning based on rules
transversal line that intersects parallel lines
incenter the pt of concurrency for angle bisectors of an triangle
circumcenter the pt. of concurrency for perpendicular bisectors of a triangle
Centroid center of gravity, pt. of concurrency for 3 medians
arc length distance from one endpoint of an arc to the other endpoint of the arc
isometric drawing that shows 3 sides of an object in one view
Created by: VaLeRiA!