Math Vocabulary Review
Geometry
SOL 2.15ab, 2.16
Plane Shapes: Shapes that lie on a flat surface, such as a circle, a square, a triangle, and a
rectangle.
Circle: A plane figure in which all the points are the same distance from a point called the
center.
Square: A polygon that has four equal sides and four right angles.
Triangle: A polygon with three sides.
Rectangle: A quadrilateral with four right angles and opposite sides that are parallel and the
same length.
Solid Figure: A figure that has length, width, height, and volume.
Flat Surface: An area that has length and width, but no thickness.
Vertex (Vertices): A point (or points) where two sides or two or more edges meet.
Edge: Where two flat surfaces of a solid figure meet.
Cone: A solid figure with one circular base and one vertex.
Cube: A solid figure with six faces that are all squares of the same size.
Cylinder: A Solid figure with two congruent circular faces.
Pyramid: A solid figure with a base that is a polygon and faces that are triangles with a
common vertex.
Rectangular Prism: A solid figure with six faces that are all rectangles.
Sphere: A solid figure that has the shape of a round ball.
Net: a Two-dimensional representation of the flat surfaces on a solid figure.
Angle: Two sides with a common endpoint.
Side: A line segment forming part of a plane figure.
Congruent: Having the same size and the same shape.
Line of Symmetry: A line on which a figure can be folded so that both halves are congruent.
Turn: To rotate a plane figure.
Flip: To turn a plane figure over.
Slide: To move a plane figure in one direction.
Pentagon: A polygon with five sides.
Hexagon: A polygon with six sides.
Parallelogram: A quadrilateral with each pair of opposite sides that are parallel.
Trapezoid: A quadrilateral with only one pair of opposite sides that are parallel.