Details Title: 2D Geometry Description: vocabulary Total Flash Cards: 26 Created: 03/27/2009 08:23:21		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Mathematics Flashcards
Cards in this set: Term circle Definition a closed curve with all its points in one plane and the same distance from a fixed point (the center) Term circumference Definition the boundary line, or perimeter, of a circle or the length of the perimeter of a circle Term diagram Definition a drawing that represents a mathematical situation Term diameter Definition 1. a line that passes through the center of a circle 2. the distance of a line that passes throught the center of a circle Term equilateral triangle Definition a triangle whose sides are all the same length Term hexagon Definition a polygon with six sides Term isosceles triangle Definition a triangle that has at least two congruent sides Term line of symmetry Definition a line that divides a figure into two congruent halves that are mirror images of one another Term octagon Definition a polygon with 8 sides Term parallelogram Definition a quadrilateral with two pairs of parallel and congruent sides Term pentagon Definition a polygon that has 5 sides Term plane figure Definition any two-dimensional figure Term polygon Definition a closed figure formed from line segments that meet only at their endpoints Term quadrilateral Definition a four-sided polygon Term radius Definition the segment, or the length of the segment, from the center of a circle to a point on the circle Term rectangle Definition a quadrilateral with two pairs of congruent, parallel sides and four right angles Term reflection Definition a transformation creating a mirror image of a figure of the opposite side of a line Term regular polygon Definition a polygon with all sides the same length and all angles the same measures Term rhombus Definition a parallelogram with all four sides equal in length Term right triangle Definition a triangle that has one 90-degree angle Term rotation Definition a transformation in which a figure is turned in a given angle and direction around a point Term side Definition a line segment connected to other segments to form a polygon Term translation Definition a transformation that slides a figure a given distance in a given direction Term trapezoid Definition a quadrilateral with exactly one pair of parallel sides Term similar figures Definition figures that have the same shape, but not necessarily the same size, with corresponding angles equal and corresponding sides proportional Term Definition