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31 terms

Math Vocabulary

third grade, math, vocabulary
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angle
a figure that is formed by two rays or two line segments that have the same endpoint
apex
the vertex of a cone or the vertex where the faces that are not a base of a pyramid meet
area
the amount of surface inside a shape
array
An arrangement of objects in rows and columns
circumference
the distance around a circle, or its perimeter
congruent
two figures that have the same shape and same size
degree
a unit of measure for angles and for temperature
diameter
a line segment that goes through the center of a circle and has endpoints on the circle
estimate
an answer that is close to an exact answer
fahrenheit
the temperature scale used in the U.S. customary system
geometry
the study of shapes
intersect
to meet or cross
line
a straight path that goes on forever in both directions
maximum
the largest number in a set of data
mean
an average number in a set of data
median
the middle number in a set of data, when the numbers are put in order from smallest to largest, or largest to smallest
minimum
the smallest number in a set of data
mode
the number or value that occurs most often in a set of data
parallel
always the same distance apart, and never meeting or crossing each other
parallelogram
a 4-sided polygon that has 2 pairs of parallel sides that are the same length
polygon
a closed figure on a flat surface that is made up of line segments joined end to end.
quadrangle
a polygon that has four sides and four angles
quadrilateral
a polygon that has four sides and four angles
radius
a line segment that goes from the center of a circle to any point on the circle
range
the difference between the biggest (maximum) and the smallest (minimum) numbers in a set of data
rectangle
a parallelogram whose corners are all right angles
sphere
a solid with a curved surface that looks like a ball or a globe
trapezoid
a 4-sided polygon with exactly one pair of parallel sides
triangle
a polygon that has three sides and three angles
vertex
the point where the rays of an angle or the sides of a polygon meet
perimeter
the distance around a shape