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Words and Definitions

Intersecting Lines Lines that meet and cross at one point
Equivalent Fraction Fractions that name the same amount
Fact Family Related facts using the same numbers
Rectangular Prism A space figure whose faces are all rectangles
Rotation To move around a point in a circular motion
Reflection (flip) To pick up and turn over
Estimate An approximate rather than an exact answer
Translation To move along a line without picking up
Standard Form A number written with digits
Perimeter The distance around a polygon
Place Value The value determined by the position of a digit in a number
Right Angle An angle that has the shape of a square corner and is 90 degrees
Congruent Figures that have the same size and shape
Perpendicular Two intersecting lines that form right angles
Area The number of square units needed to cover a regions
Fraction A number that names a part of a set or part of a region
Vertex/Vertices The point of intersection of two sides of a polygon, or three edges of a space figure
Acute Angle An angle less than a right angle or 90 degrees
Word Form A number written as words
Hexagon A polygon with six sides and six vertices
Volume The number of cubic units that fit inside a space figure
Parallel Lines Lines that never intersect
Probability The chance that an event will occur
Obtuse Angle An angle greater than a right angle
Edge A segment where two plane faces of a space figure meet
Expanded form A number represented by its place value
Polygon A closed plane figure with sides
Pentagon A polygon with five sides and five vertices
Square Pyramid A space figure with a square base and faces that are triangles with a common vertex
Face A flat surface of s space figure
Symmetry A line on which a figure can be folded so that both sides match
Octagon A polygon with eight sides and eight vertices
Created by: karen.hubbert