4th Grade Math Vocabulary

A.M.	Used to show time between midnight and noon
Acute Triangle	A triangle with three acute angles
Addend	The number added to another in an addition problem
Angle	A figure formed by two line segments or rays that share the same endpoint
Area	The number of square units needed to cover a surface
Array	An arrangement of objects in rows and columns
Associative Property Of Addition	The property that states that you can group addends in different ways and still get the same sum
Average	The sum of addends divided by the number of addends
Bar Graph	A graph that uses bars to compare data
Benchmark	A known number of things that helps you understand the size or amount of a different number of things
Capacity	The amount a container can hold when filled
Center	The point inside a circle that is the same distance from each point on the circle
Centimeter	A metric unit of measure 100 ________ = 1 meter
Century	A measure of time equal to 100 years
Certain	To be sure or definite
Chord	A line segment that has endpoints on a circle
Circle	A closed figure made up of points that are all the same distance from the center
Circle Graph	A graph in the shape of a circle that shows data as a whole made up of different parts
Circumference	The distance around a circle
Closed Figure	A plan figure that completely surrounds an area
Commutative Property Of Addition	The property that states that when the order of two addends is changed, the sum is the same
Compass	A tool used to construct circles
Compatible Numbers	Numbers that are easy to compute mentally
Composite Number	A whole number that has more than two factors
Cone	A space figure with 1 curved surface, 1 flat face, 1 curved edge, and 1 vertex