K-5 Definitions of Math Terms

K-5 Definitions of Math Terms

TERM

DEFINITION

acute angle

An angle with measure between zero degrees and 90 degrees.

acute triangle

Triangle with all interior angles measuring less than 90 degrees.

addend

A number used in the mathematical operation of addition (e.g., 6 + 8 = 14, 6 and 8 are addends).

addition

A mathematical operation that combines two or more numbers to calculate a sum.

adjacent angle

Two angles ................
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