# Shared Flashcard Set

## Details

geometry math terms
things from triangles to planes to congruent figures
36
General Vocab
03/03/2009

Term
 triangle
Definition
 polygon with 3 sides.
Term
Definition
 polygon with 4 sides.
Term
 pentagon
Definition
 polygon with 5 sides.
Term
 polygon
Definition
 a geometric figure with 3 or more sides and angles.
Term
 hexagon
Definition
 polygon with 6 sides.
Term
 heptagon
Definition
 polygon with 7 sides.
Term
 octagon
Definition
 polygon with 8 sides.
Term
 nonagon
Definition
 polygon with 9 sides.
Term
 decagon
Definition
 polygon with 10 sides.
Term
 square
Definition
 parallelogram with 4 right angles and 4 congruent sides.
Term
 rectangle
Definition
 parallelogram with 4 right angles.
Term
 rhombus
Definition
 parallelogram with 4 congruent sides.
Term
 trapezoid
Definition
 quadrilateral with exactly one pair of opposite sides parallel.
Term
 parallelogram
Definition
 quadrilateral with opposite sides parallel and opposite sides congruent.
Term
 transformation
Definition
 any kind of movement of a geometric figure.
Term
 translation
Definition
 figures that slide from one location to another without changing size or shape.
Term
 rotation
Definition
 figures that are turned without changing size or shape.
Term
 reflection
Definition
 figures that are flipped over a line without changing size or shape.
Term
 volume
Definition
 number of cubic units needed to fill the space occupied by a solid.
Term
 perimeter
Definition
 distance around a geometric figure.
Term
 area
Definition
 number of square units needed to cover a surface enclosed by a geometric figure.
Term
 surface area
Definition
 sum of the areas of all the faces of a three-dimensional figure.
Term
 circle
Definition
 set of all points in a plane that are the same distance from a given point.
Term
 regular polygon
Definition
 polygon with all sides congruentand all angles congruent.
Term
 straight angle
Definition
 angle that is exactly 180°.
Term
 acute angle
Definition
 angles that is less than 90°.
Term
 vertex
Definition
 point of intersection of two sides of polygon.
Term
 obtuse angle
Definition
 angle that is between 90° and 180°.
Term
 right angle
Definition
 angle that is exactly 90°.
Term
 diagonal
Definition
 segment that joins two vertices of a polygon but is not a side.
Term
 angle
Definition
 figure formed by two rays that begin at the same point.
Term
 complementary angle
Definition
 angles that add up to 90°.
Term
 supplementary angles
Definition
 angles that add up to 180°.
Term
 congruent figures
Definition
 figures that are the same size and same shape
Term
 similar figures
Definition
 figures that are the same shape and may or may not have same size.
Term
 line of symmetry
Definition
 place where a figure can be folded so that both halves are congruent.
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