Question | Answer |
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 |