Download Vocabulary Flash Cards (part 1)

angle
QI-I ito a
annlo
acuie
igi
_ .
.
y JCOnCl itlOnal
formed by two rays with a
common endpoint
an an
9le with a measure between
0°
and 90°
A statement that contains the phrase "if and only if.
occurs tne
^
conditional and converse are
true.
formed by switching and negating the hypothesis
and conclusion, (you basically switch everything)
example: if you like candy, then you like cupcakes
contrapositive: if you don't like cupcakes, then you
don't like candy.
An if then statement
'
often
>
caued a "conditional"
Linear Pair
A pair of adjacent angles whose
noncommon sides are opposite
rays, they form a straight line
Segment Addition
If point B is between points A and
c then
Postulate
> AB+BC=AC
two angles whose measures have
the sum of 18 de
rees
each
°
9
(
angle is the supplement of the
<;i
mnlpmpntarv
SUppiei
liary annlp^
igies
other.)
If point B is in the interior of angle AOC, then the
of angle AOB + measure of angle BOC
equals measure of angle AOC.
measure
Angle AddltlOn POStUlate
^
i
complementary angles
two acute angles that add up to 90
degrees.
straight angle
midpoint
is a point that bisects or divides
the segmet into two congruent
segments
collinear
To lie on the same line.
2 angles that lie in the same plane and have a
common vertex and a common side, but no interior
angle bisector
is a ray that cuts the angle exactly
in half, making two equal angles.
Between
The point C is between A and B, if
A, B, and C are collinear and AC
+ CB = AB.
Congruent Angles
Congruent Segments
Objects are coplanar if they all lie
in the same plane
Diameter
A chord that passes through the
center of a circle. Also refers to
the length of the chord.
Endnoint
cnapomi
A
oint at the end of a
Psegment
or ray
an
object into two
congruent parts
Tne distance
around a circle.
Equa, to 2(pj)r or
r\f on An/-il^
OT an Mngie
(pi)d
A point that does not lie between
or on the sjdes of the angle
Longest side of a right triangle;
opposite of the right angle.
on Annlo
IMn
9'
A point that lies between the sides
of an angle.
Line
An undefined term, it is the set of
points that extends in opposite
directions without end.
ObtUSe Angle
An angle whose measure is
greater than 90 and less than 180
degrees.
Opposite raVS
Two rays with the same endpoint
that extend in opposite directions
and form a line.
D.
Add the lengths of all of the sides
of a figure
The ratio of the circumference of a
circle to the diameter.
Pi
undefined term of geometry. Flat surface made up
of points that has no depth and extends indefinitely
in all directions. Represented by a slanted foursided figure. Named by an uppercase script letter
or by three non-collinear points on the plane.
Plane
Point
An undefined term represented by
a dot, it has no dimension.
postulate
A statement that is accepted as
true without proof. Also called an
Axiom
Radius
A line segment with one endpoint on the circle and
the other on the center. Also refers to the segment's
length.