MathAhonors7 - 6.0A review vocab
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53 Terms
Point
A location in space. It has no size.
Collinear Points
Three or more points that lay on a single straight line.
Non-Collinear Points
Points that do not all lie on the same straight line.
Line Segment
A part of a line that is bounded by two distinct endpoints.
Midpoint
The line that is in the middle of a line segment.
Ray
A part of a line with exactly one endpoint that starts at a point and extends infinitely in one direction. It is named by the endpoint first.
Line
A series of points that extend opposite directions without end.
Intersecting Lines
Lines that lie in the same plane that intersects.
Parallel Lines
Lines in the same plane that never meet or intersect, maintaining a constant distance apart.
Perpendicular Lines
Two lines that intersect and form a right angle.
Skew Lines
Lines that exist in different planes, so they never intersect.
Plane
A flat, two-dimensional surface that extends infinity.
Angle
Two rays that meet at a common endpoint to form a figure measured in degrees.
Vertex
The common endpoint of an angle.
Sides
The two rays that form an angle are also known as the sides of the angle.
Acute Angle
An angle that measures from 0 to 90 degrees.
Obtuse Angle
An angle that measures between 90 to 180 degrees.
Right Angle
An angle that measures 90 degrees.
Straight Angle
An angle that measures 180 degrees.
Complementary Angles
A pair of angles whose sum is 90 degrees. They do not need to be adjacent.
Supplementary Angles
A pair of angles whose sum is 180 degrees. They do not need to be adjacent.
Adjacent Angles
Angles that share a vertex and a side.
Protractor
A tool used to measure angles.
Congruent
Equal in size and shape.
Congruency Mark
Tick marks on the sides or angles that have the same measure.
Congruent Angles
Angles that have the same measure.
Congruent Segments
Segments that have the same measure.
Polygon
A two-dimensional shape formed by a minimum of three straight line segments.
Regular Polygon
A polygon with all sides and angles congruent.
Triangle
A polygon with three sides.
Acute Tri
A triangle with all acute angles.
Obtuse Tri
A triangle with one obtuse angle.
Right Tri
A triangle with one right angle.
Scalene Tri
A triangle with no congruent sides.
Isosceles Tri
A triangle with at least two congruent sides.
Equilateral Tri
A triangle with three congruent sides.
Quadrilateral
A polygon with four sides.
Point A
Symbol - Point
PQ(over line) or QP(over line). PQ represents the length.
Symbol - Line Segment
Point B in ABC(over line)
Symbol - Midpoint
ED(→)
Symbol - Ray
AB(↔) or BA(↔)
Symbol - Line
AB(↔)∥CD(↔)
Symbol - Parallel Lines
AB(↔)⊥CD(↔)
Symbol - Perpendicular Lines
Plane P
Symbol - Plane
∠ABC ∠CBA ∠B
Symbol - Angle
∠ABC - Point B
Symbol - Vertex
BC(→) - ∠ABC
Symbol - Sides
∠ABC and ∠CBD
Symbol - Adjacent Angles
AC(over line) ≅ XY(over line)
Symbol - Congruent/Congruent Segments
∠A≅∠C
Symbol - Congruent Angles
∆ABC
Symbol - Triangle
☐ABCD
Quadrilateral
