Download Geometry Terms

Geometric Figures
Review
Chapter 19
Harcourt Math
Point
An exact position or location
Line
It continues in both directions and doesn’t end
(arrows)
Line Segment
It is a part of a line and has 2 endpoints
Ray
A part of a line, with one endpoint, that is
straight and continues in one direction.
Angle
A figure formed by 2 rays or line
segments that share an endpoint.
Right Angle
A special “L” shaped angle that forms a
square corner; a right angle measures 90°.
Acute Angle
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An angle that has a measure less than a
right angle.
Obtuse Angle
An angle that has a measure greater than
a right angle
Intersecting Lines
Lines that cross
Parallel Lines
Lines that never cross; lines that are
always the same distance apart.
Perpendicular Lines
Lines that intersect to form right angles
Polygon
A closed plane figure with straight sides
that are line segments.
Equilateral Triangle
A triangle that has 3 equal sides
and 3 equal angles
Isosceles Triangle
A triangle that has two equal sides
Right Triangle
A triangle with one right angle
Quadrilateral
A four-sided polygon.
Parallelogram
A four-sided polygon with two pairs of
parallel sides.
Rhombus
A quadrilateral with 2 pairs of
parallel sides and 4 equal sides
Rectangle
A quadrilateral with
2 pairs of parallel sides,
2 pairs of equal sides,
and 4 right angles
Trapezoid
A four-sided polygon having exactly one
pair of parallel sides.
Pentagon
A polygon with 5 sides and 5 angles
Hexagon
A polygon with 6 sides and 6 angles
Octagon
A polygon with 8 sides and 8 angles
Which term best describes the
following figure?
An exact position or location
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(a) point
(b) ray
(c) angle
(d) line
Which term best describes the
following figure?
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(a) rectangle
(b) rhombus
(c) parallelogram
(d) polygon
Which term best describes the
following figure?
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(a) acute angle
(b) right angle
(c) obtuse angle
(d) parallel lines
Which term best describes the
following figure?
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(a) point
(b) line
(c) line segment
(d) ray
Which term best describes the
following figures?
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(a) acute angles
(b) right angles
(c) obtuse angles
(d) intersecting lines
Which term best describes the
following figure?
A figure made of two rays that share the
same endpoint.
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(a) angle
(b) line
(c) square
(d) polygon
Which term best describes the
following figure?
Lines that never cross, they are always
the same distance apart.
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(a) intersecting lines
(b) parallel lines
(c) perpendicular lines
(d) angles
Which term best describes the
following figure?
Lines that intersect to form right angles.
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(a) intersecting lines
(b) parallel lines
(c) perpendicular lines
(d) angles
Which term best describes the
following figure?
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(a) quadrilateral
(b) pentagon
(c) hexagon
(d) octagon
Which term best describes the
following figure?
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(a) quadrilateral
(b) pentagon
(c) hexagon
(d) octagon
Which term best describes the
following figure?
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(a) parallelogram
(b) polygon
(c) rhombus
(d) trapezoid
Which term best describes the
following figures?
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(a) pentagons
(b) polygons
(c) rhombuses
(d) octagons
Which term best describes the
following figures?
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(a) equilateral triangles
(b) right triangles
(c) isosceles triangles
(d) quadrilaterals