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

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apex

the vertex of a cone or the vertex where the faces that are not a base of a pyramid meet

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area

the amount of surface inside a shape

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array

An arrangement of objects in rows and columns

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circumference

the distance around a circle, or its perimeter

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congruent

two figures that have the same shape and same size

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degree

a unit of measure for angles and for temperature

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diameter

a line segment that goes through the center of a circle and has endpoints on the circle

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estimate

an answer that is close to an exact answer

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fahrenheit

the temperature scale used in the U.S. customary system

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geometry

the study of shapes

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intersect

to meet or cross

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line

a straight path that goes on forever in both directions

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maximum

the largest number in a set of data

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mean

an average number in a set of data

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median

the middle number in a set of data, when the numbers are put in order from smallest to largest, or largest to smallest

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minimum

the smallest number in a set of data

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mode

the number or value that occurs most often in a set of data

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parallel

always the same distance apart, and never meeting or crossing each other

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parallelogram

a 4-sided polygon that has 2 pairs of parallel sides that are the same length

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polygon

a closed figure on a flat surface that is made up of line segments joined end to end.

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quadrangle

a polygon that has four sides and four angles

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quadrilateral

a polygon that has four sides and four angles

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radius

a line segment that goes from the center of a circle to any point on the circle

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range

the difference between the biggest (maximum) and the smallest (minimum) numbers in a set of data

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rectangle

a parallelogram whose corners are all right angles

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sphere

a solid with a curved surface that looks like a ball or a globe

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trapezoid

a 4-sided polygon with exactly one pair of parallel sides

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triangle

a polygon that has three sides and three angles

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vertex

the point where the rays of an angle or the sides of a polygon meet

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perimeter

the distance around a shape