Ms. Roberts' integrated Literacy & Math website
Home
Common Core Standards
Vocabulary
Vocabulary Strategies
Vocabulary Game
Mathematical Vocabulary
Children's Literature
Word Problems
Parent/Child Activities
Games, Websites, and Apps
Games
Websites
Applications
Lesson Plan
References
Geometry Unit Vocabulary terms
2D or plane shapes
Two-dimensional or flat shapes, having only the two dimensions of length and breadth (width).
3D or solid shapes
Three-dimensional shapes having length, breadth and height.
Angle
The amount of turning between two lines meeting at a common point.
Congruent
Having the same shape and the same size.
Edge
The side of a polygon or a line segment where two faces of a solid figure meet.
Face
Thee flat surface of a three-dimensional shape.
Geome
try
Area of mathematics dealing with solids, surfaces, points, lines, curves and angles, and their relationships in space.
Line of symmetry
Divides a symmetrical object in half (into two congruent sides).
Parallel
Lines that are the same distance apart.
Parallelogram
A quadrilateral with opposite sides that are parallel and of equal length and opposite angles that are equal.
Polygon
A plane shape having three or more straight sides.
Protractor
Instrument used to measure angles.
Quadrilateral
A polygon with four sides.
Ray
A line that has a starting point but no endpoint.
Shape
Form or outline.
Pattern of objects.
Side
A straight line joining the vertices of a polygon.
Symmetry
An object is symmetrical when one half is a mirror image of the other half.
Vertex
A point where:
Two or more rays or the arms of an angle meet,
the adjacent sides of a polygon meet, or
the edges of a solid figure meet.