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74 Cards in this Set
 Front
 Back
______ is defined as the ratio between the circumference and the diameter of a circle.

pi


_________(Bisector, Collinear, Concurrent, Corresponding) points lie on the same line.

Collinear


_________is the set of all points

Space


{rational numbers} union {irrational numbers} =

real numbers


A __________ of a polygon is a line that has vertices for endpoints but that is not a side of the polygon

diagonal


A ___________ of polygon is an endpoint of a side of the polygon.

vertex


A __________separates space into two halfspaces.

plane


A ∩ A' =

empty (or null) set


A closed curve made of segments

polygon


A cube is a regular ________________ (rectangle, polygon, hexahedron, square)

hexahedron


A curve that ends at its starting point

closed


A curve that is a subset of a circle

arc


A line segment with endpoints on a circle

chord


A parallelogram with a right angle

rectangle


A point divides a line into three disjoint sets, the point and _________.

2 half lines


A polygon that is always convex

triangle


A polygon that is equilateral but not equiangular

rhombus


A polygon with eight sides

octagon


A polygon with no diagonals

triangle


A segment is ___________ to a circle if it intersects the circle in only one point.

tangent


A statement accepted as true without proof

postulate


A tetrahedron has _________ faces.

4


A U A' =

universal set


All radii of the same circle are _________.

congruent


An angle is a set of points (true or false).

TRUE


An angle measuring 180 degrees

straight


An angle measuring between 90 and 180 degrees.

obtuse


An angle that measures 90 degrees

right


An angle with a measure between 0 and 90 degrees

acute


An octagon prism is a (decahedron, dodecahedron, hexahedron, oxyhedron)

decahedron


Any two points in space lie in one and only one __________.

line


Are all sides of an isoceles triangle equal?

no


Are all squares rectangles?

yes


Are all squares rhombi?

yes


Are regular polygons concave?

no


Can an equilateral triangle contain an obtuse angle

no


Four noncollinear points always determine _________.

(nothing in particular)


Geometry is an abstract model of _____________________________.

our orderly physical universe


Ideally a set of postulates should be ____________, ______________, and _____________.

independent, consistent, complete


If a > 0, then a = a, but if a < 0, then a = a.

FALSE


If A is between B and C, then AB = CA if and only if _____________

A is the midpoint


If PDF, then then D is ___________P and F.

bewtween
(PF = FP + DP) 

If R is the midpoint of of MA, the formula for the midpoint is ___________.

r = (m+a)/2


If the radius of a circle is 4, what is the circumference?

8π


If two angles are a linear pair are they supplementary angles?

yes


If X is in the interior of ABC, and mABX = mCBX, then BX is the ______ of ABC (ABC, ABX, CBX are angles, m means measure).

bisector


Is a rhombus a regular triangle?

no


Lines that intersect and form an angle measuring 90 degrees.

perpendicular


Lines that intersect in a single point are _________ lines.

concurrent


One radius is equal to ____ diameter.

1/2


Perpendicular lines form ___________ angles

right


Pi and the square root of 2 are ____________ numbers (integer, rational, irrational, imaginary)

irrational


Planes in a space that do not intersect are ___________planes.

parallel


The intersection of two disjoint sets

empty (or null) set


The intersection of two distinct planes

line


The number of bases in a triangular pyramid

one


The opposite angles of two intersecting lines

vertical angles


The parallel sides of a trapezoid

bases


The set of points in a plane that are a given distance from a point

circle


The side opposite the right angle in a right triangle

hypotenuse


The sum of the lengths of the sides of a polygon

perimeter


The symbol for halfline EP is ____

EP (with o– above it)


The three undefined terms are

point, line, and plane


The union of three noncollinear points and the line segments connecting them

triangle


The union of two coplanar halfplanes and their common edge.

plane


The union of two distinct rays with a common endpoint

angle


Two adjacent angles that are supplementary

linear pair


Two angles whose measures have a sum of 90 degrees

complementary


Two interesecting lines are contained in one and only one __________.

plane


When two lines intersect, they intersect in one and only one ____________.

point


Which is a regular polygon (pentagon, octagon, square, triangle, none of these)?

square


Which is not a polyhedron? (pyramid, cube, prism, cone, none of these)

cone


Which of the following is not a polygon? rectangle, base of a pyramid, base of a cone, triangle)

base of a cone (a circle)


Who systematized geometry around 300 B.C.

Euclid
