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Embed code for: Final Unit 1Geometry Vocab Cards
Select a size
Indicates a location
Has no size
How to name:
Name the point using a CAPITAL letter: Point A
Represented by a straight path that extends in two opposite directions
Never ends, has no thickness, & contains infinitely many points
NAME a line by any 2 points on the line ( AB or BA )
Represented by a flat surface.
Never ends, has no thickness, & contains infinitely many lines
NAME a plane by at least 3 points in the plane that do not all lie on the same line (Plane ACB or Plane DBAC)
Points that lie on the same line
Points and lines that lie on
the same plane
The set of all points in
Part of a line that has a
starting point and an ending
Name a segment by its 2 endpoints. Order DOES NOT matter. ( AB or BA ) - these lines need no endpoints
Part of a line that consists of one endpoint and extends forever in the opposite direction. (Combination of line & segment)
Name a ray by its endpoint FIRST and any other point on the ray ()
Two rays that share the same endpoint and form a line
Name opposite rays by their shared endpoint FIRST and any other point on each ray ()
The set of points (or lines) that figures have in common.
Two lines intersect at exactly 1 point.
Two planes intersect at exactly 1 line.
Segment Addition Postulate
Angle Addition Postulate
Remember:Part + Part = Whole
An accepted statement of fact.
They are the basic building blocks of the logical system in Geometry.
2 segments have the same
≅ (symbol for similar lengths)
a point that divides the segment into two congruent segments.
Q is the midpoint and PQ ≅ QR
a point, line, ray, or other segment that intersects a segment at its midpoint
Formed by two rays with the same endpoint.
Parts of an angle:
Sides & Vertex
Sides (of an angle)
Sides of and angle are made
up by 2 rays.
Vertex – Point where two or more straight lines meet. Endpoint of the two connecting rays.
AHow to Name an Angle
Name an angle by…
Its vertex, ∠A
a point on each ray and the vertex, ∠BAC or ∠CAB **
a number, ∠1
Interior of an Angle
The region containing all the points between the two sides of the angle
Exterior of an Angle
The region containing all of the points outside of the angle.
Between 0º & 90º
A right angle is:
*Marked with box on the vertex
An angle that measures between 90º & 180º
An angle that measures 180o
How to name: ∠JKL or ∠ LKJ
2 angles that share a common side but do not overlap
Angle a is adjacent to angle b
Opposite pairs of congruent angles made when 2 lines intersect
Occur when 2 lines intersect.
∠1 ≅ ∠ 3
∠2 ≅ ∠ 4
Two angles whose measures add up to 90o
∠1 + ∠ 2 = 90o
2 angles whose measures add up to 180º
If 2 angles form a linear pair, then they are supplementary
A ray that divides an angle into 2 congruent angles (cuts in half)
Bisects means = halves