Math

Geometry Vocabulary

Some of these definitions are lengthy, but students should still look for key words within the definition.   

Cube	A solid figure with six congruent square faces and with every edge the same length. A cube has 8 vertices and 12 edges.
Cylinder	A solid figure formed by two congruent parallel circles joined by a curved surface.
Cone	A solid, pointed figure that has a flat, round face (usually a circle) that is joined to a vertex by a curved surface.
Rectangular Prism	A solid figure in which all six faces are rectangles with three pair of parallel congruent opposite faces.
Sphere	A solid figure with all of its points the same distance from its center.
Square Pyramid	A solid figure with one square face and four triangular faces that share a common vertex.
Face	A polygon that serves as one side of a solid figure (e.g. a square is a face of a cube)
Angle	Formed by two rays with a common endpoint. This endpoint is called a vertex. Angles are found wherever lines intersect.
Edge	The line segment where two faces of a solid figure intersect.
Vertex	The point at which two lines, line segments, or rays meet to form an angle. It is also the point on a three-dimensional figure where three or more faces intersect.
Line	A straight path that goes on forever in two directions
Ray	A straight path that begins at an endpoint and goes on forever in the other direction.
Point	A location on a plane.
Line Segment	Part of a line that has two endpoints
Angle	Two rays that meet at a point
Parallel Lines	Lines that will never cross
Intersecting Lines	Lines that cross each other
Perpendicular Lines	Lines that form right angles at the point where they cross.
Congruent	Equal; Same size an same shape
Non-congruent	Not equal; not the same size and shape

Properties of Addition & Multiplication 

Identity Property of Addition	Any number plus 0 equals that number	41 + 0 = 41 8 + 0 = 8
Identity Property of Multiplication	Any number multiplied by 1 equals that number	63 x 1 = 63 9 x 1 = 9
Commutative Property of Addition	You can change the order of the addends and you still get the same sum	4 + 6 = 6 + 4 5 + 8 = 8 + 5
Commutative Property of Multiplication	You can change the order of the factors and you still get the same product	12 x 2 = 2 x 12 5 x 7 = 7 x 5

   

Math Vocabulary

Fraction - a number used to name a part of a whole 

Factor - the numbers that are multiplied together in a multiplication problem

Product - the solution to a multiplication problem

Addend - the numbers that are added together in an addition sentence

Sum - the solution to an addition problem

Difference - the solution to a subtraction problem

Quotient - the solution to a division problem 

Array - a way to represent a multiplication problem using columns and rows

Numerator - the number above the bar in a fraction; the number that names the part

Denominator - the number below the bar in a fraction; the number that names the whole

Survey - a way to collect data to organize for an experiment or a graph

Graph - a type of drawing used to represent data in an interesting way