| A | B |
|---|
| area | the measure (usually in square units) of the interior region of a 2-dimensional figure |
| circumference | the distance around a circle |
| cone | a three-dimensional figure that consists of a circular face (the base), a point not in the plane of the base (the vertex), and a lateral surface that connects the vertex to each point on the boundary of the base |
| congruent figures | two or more geometric figures that have the same size and shape |
| cylinder | a 3-dimensional figure that consists of 2 parallel,congruent, circular regions (bases) and a lateral surface that connects the boundaries of the bases |
| decagon | a polygon with 10 sides |
| diameter | a chord that contains (is drawn through) the center of a circle |
| equilateral triangle | a triangle with 3 congruent sides and 3 congruent angles; each angle measures 60 degrees |
| heptagon | a polygon with 7 sides; also called a septagon |
| hexagon | a polygon with 6 sides |
| isosceles triangle | a triangle with at least 2 congruent sides |
| nonagon | a polygon with 9 sides |
| octagon | a polygon with 8 sides |
| parallelogram | any quadrilateral with both pairs of opposite sides parallel |
| pentagon | a polygon with 5 sides |
| perimeter | the distance around a geometric figure |
| perpendicular lines | two lines that intersect to form right angles |
| pi | the approximate ratio of the circumference of a circle to its diameter |
| polygon | a simple, closed, plane figure with 3 or more sides that are line segments |
| pyramid | a polyhedron with a polygonal base, triangular faces, & a vertex |
| quadrilateral | a polygon with 4 sides |
| rectangle | a parallelogram with one right angle; a square is a special case of a rectangle with 4 congruent sides |
| rhombus | a parallelogram with 4 congruent sides |
| similar | having the same shape but not necessarily the same size |
| square | a parallelogram with 1 right angle and 4 congruent sides |
| trapezoid | a quadrilateral with exactly one pair of parallel sides |
| volume | the total amount of space inside a 3-dimensional object |
