Transcript Document 7269262

Vocabulary Review
By Megan Stussi, Eric Wilkinson and
Jesse Walker
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Terms and Diagrams taken from “Harcourt Multimedia Math Glossary”
http://www.harcourtschool.com/glossary/math_advantage/glossary6.html
Angle
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• A geometric figure formed by two
rays that have a common endpoint
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Arc
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• A portion of a circle
• A semicircle is an arc that is onehalf of a circle.
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Circumference
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• The distance around a circle
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• C = 2π x r
C=πxd
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Area
• The size of a surface
• The number of square units needed
to cover a given surface
• Example:
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The area is 9 square units.
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Area
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• Square
A = side x side
• Rectangle
A = base x height
A = length x width
• Triangle
A = ½ (base x height)
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Area
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• Trapezoid
A = ½ (base1 + base2) x height
• Circle
A = π x radius2
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Volume
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• The number of cubic units needed to
occupy a given space
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• The volume of the cube is 8 cubic units.
• Volume of a rectangular prism:
V = (length) (width) (height)
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• Volume of a cube: volume = side3
Chord
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• A line segment connecting two
points located on the circle.
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Coordinate Plane
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• A plane formed by a horizontal line
(x-axis) that intersects a vertical line
(y-axis) at a point called the origin
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Radius
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• A line segment with one endpoint at
the center of a circle and the other
endpoint on the circle
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Diameter
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• A line segment through the center
of a circle, with endpoints on the
circle
• Equal to twice the radius
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ab is a diameter of the circle.
Perimeter
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• The distance around a polygon
• Perimeter = side1 + side2 + side3…..
• P = 2 cm + 3 cm + 3 cm = 8 cm
• Perimeter of a square: p = 4 x side
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• Perimeter of a rectangle: p = 2b + 2h
Pi
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π
• The ratio of the circumference of a
circle to the length of its diameter
• Pi ≈ 3.14
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Or Pi ≈
3.14159265358979323846264338327950288419716
939937510… (to the first 50 decimal places)
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Quadrilateral
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• A four-sided polygon
• Examples:
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