1. tangent: a line that intersects a circle at exactly
one point
2. tangent circles: two circles that intersect at
exactly one point
3. central angle: an angle whose vertex is the center
of a given circle
4. Arc: the set of points on a circle that are in
1.Cevian: any line segment joining a vertex of
a triangle to a point on the opposite side
other than the vertices.
2.Altitude: the perpendicular segment from a
vertex of a triangle to the line containing
the opposite side.
3.Base: given an altitude or cev
Theorem: Once a statement or conjecture has been
shown to be true, it is called a theorem, and it can be
used like a definition or postulate to justify that other
statements are true.
Difference between Postulates and theorems: A
postulate is a statement
Line Segment- can be measured because it has
two endpoints. A segment with endpoints A and
B can be named as AB or BA. The length or
measure of AB is written as AB.
Precision- The precision of any measurement
depends on the smallest unit available on th
A Right triangle is an angle whose measure is
90.
An acute angle has measure less than 90.
An obtuse angle has measure greater than 90
but less than 90.
Ray- A ray is part of a line. It has one endpoint and
extends indefinitely in one direction. Rays are
Angle- a figure formed by two rays, or
sides, with a common endpoint.
Vertex- the common endpoint in an
angle
Interior of an angle- the set of all points
between the sides of an angle.
Exterior of an angle- the set of all points
between the sides of an an
Complementary Angles are two angles whose
measures have a sum of 90
Supplementary Angles- are two angles whose
measures have a sum of 180.
Perpendicular Lines- Lines, rays, and segments that
form four right angles are perpendicular.
PERPENDICULAR LINES
Points, Lines, and Planes:
They model, shapes, points, lines, and
planes do not have any actual size.
In geometry, point, line, and plane are
considered undefined terms because they
are only explained using examples and
descriptions.
A point is a locat
If parallel lines are cut by a
transversal,then corresponding angles are
congruent.
If parallel lines are cut by a transversal,
then alternate interior angles are
congruent.
If parallel lines are cut by a
transversal,then same side interior angles
are
A formal logic system consists of a set of statements and
a set of rules of inference.
An affine plane is an incidence structure satisfying the
following three axioms.
There is a unique line through any two distinct
points.
Through any point not on a gi