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Vocabulary Cards
Topic 9 Set A
Words
Vocabulary Cards Topic 9
Set A Words
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Name
Intersecting Lines
Line
Lesson 9–1
Lesson 9–1
Parallel Lines
Perpendicular
Lines
Lesson 9–1
Lesson 9–1
Plane
Point
Lesson 9–1
Lesson 9–1
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Topic 9
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Name
Vocabulary Cards Topic 9
Set A Definitions
Vocabulary Cards
Topic 9 Set A
Definitions
Intersecting Lines
A straight path of points
that goes on and on in
two directions.
Lines that cross at
one point.
Perpendicular Lines
Parallel Lines
Two intersecting lines that
form right angles.
In a plane, lines that
never intersect.
Point
Plane
An exact location
in space.
An endless flat surface.
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Line
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Topic 9
Vocabulary Cards
Topic 9 Set B
Words
Vocabulary Cards Topic 9
Set B Words
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Name
Acute Angle
Angle
Lesson 9–2
Lesson 9–2
Line Segment
Obtuse Angle
Lesson 9–2
Lesson 9–2
Ray
Right Angle
Lesson 9–2
Lesson 9–2
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Topic 9
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Name
22
Angle
Acute Angle
A figure formed by
two rays that have the
same endpoint.
An angle that is less than a
right angle.
Obtuse Angle
Line Segment
An angle that is greater
than a right angle.
A part of a line that has
two endpoints.
Right Angle
Ray
An angle that forms a
square corner.
A part of a line that
has one endpoint and
continues endlessly in
one direction.
Topic 9
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Vocabulary Cards Topic 9
Set B Definitions
Vocabulary Cards
Topic 9 Set B
Definitions
Name
Vocabulary Cards
Topic 9 Set C
Words
Vocabulary Cards Topic 9
Set C Words
Straight Angle
Lesson 9–2
Degrees
Protractor
Lesson 9–3
Lesson 9–3
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Side
Lesson 9–4
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Name
Vocabulary Cards Topic 9
Set C Definitions
Vocabulary Cards
Topic 9 Set C
Definitions
Straight angle
An angle that forms a
straight line.
Protractor
Degrees
A tool used to measure
and draw angles.
The measurement used
for angles.
Side
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Each of the line segments
of a polygon.
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Topic 9
Vocabulary Cards
Topic 9 Set D
Words
Vocabulary Cards Topic 9
Set D Words
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Name
Vertex
Hexagon
Lesson 9–4
Lesson 9–4
Octagon
Pentagon
Lesson 9–4
Lesson 9–4
Polygon
Quadrilateral
Lesson 9–4
Lesson 9–4
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Topic 9
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Name
Vocabulary Cards Topic 9
Set D Definitions
Vocabulary Cards
Topic 9 Set D
Definitions
Hexagon
Vertex
(plural, vertices)
The point where two rays
meet to form an angle. The
point where the sides of a
polygon meet. The point
where three or more edges
meet in a solid figure that
does not roll. The pointed
part of a cone.
Pentagon
Octagon
A polygon with 5 sides.
A polygon with 8 sides.
Quadrilateral
Polygon
A polygon with 4 sides.
A closed plane figure
made up of line segments.
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A polygon with 6 sides.
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Topic 9
Name
Vocabulary Cards
Topic 9 Set E
Words
Vocabulary Cards Topic 9
Set E Words
Triangle
Lesson 9–4
Acute triangle
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Lesson 9–5
Equilateral
triangle
Isosceles
triangle
Lesson 9–5
Lesson 9–5
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Name
Vocabulary Cards Topic 9
Set E Definitions
Vocabulary Cards
Topic 9 Set E
Definitions
Triangle
A polygon with 3 sides.
Acute triangle
A triangle with three
acute angles.
Equilateral triangle
A triangle that has at least
two equal sides.
A triangle in which all
sides are the same length.
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Isosceles triangle
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Topic 9
Vocabulary Cards
Topic 9 Set F
Words
Obtuse triangle
Right triangle
Lesson 9-5
Lesson 9-5
Scalene triangle
Parallelogram
Lesson 9-5
Lesson 9-6
Rectangle
Rhombus
Lesson 9-6
Lesson 9-6
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Topic 9
Vocabulary Cards Topic 9
Set F Words
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Name
29
30
Vocabulary Cards
Topic 9 Set F
Definitions
Right triangle
Obtuse triangle
A triangle in which there is
one right angle.
A triangle in which there is
one obtuse angle.
Parallelogram
Scalene triangle
A quadrilateral in which
opposite sides are parallel.
A triangle in which no
sides are the same length.
Rhombus
Rectangle
A quadrilateral in which
opposite sides are parallel
and all sides are the
same length.
A quadrilateral with 4
right angles.
Topic 9
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Vocabulary Cards Topic 9
Set F Definitions
Name
Name
Vocabulary Cards
Topic 9 Set G
Words
Lesson 9–6
Lesson 9–6
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Trapezoid
Vocabulary Cards Topic 9
Set G Words
Square
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Vocabulary Cards Topic 9
Set G Definitions
Name
Vocabulary Cards
Topic 9 Set G
Definitions
Square
A quadrilateral with only
one pair of parallel sides.
A quadrilateral with 4 right
angles and all sides the
same length.
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Trapezoid
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Topic 9