Geometry 1: Tools of Geometry Flashcards

2811249357	undefined term	a point, line, or plane because they can only be explained using examples and descriptions	0
2811249358	point	Location in space, it has no size	1
2811250298	line	A collection of an infinite number of points in a straight pathway with unlimited length and having no width.	2
2811250299	plane	a flat surface that extends forever	3
2811250628	collinear	points on the same line	4
2811250629	coplanar	points that lie in the same plane	5
2811251275	space	The set of all points	6
2811252466	line segment	a part of a line with two endpoints. It is named by its 2 endpoints.	7
2811252832	betweeness of points	A point is "between" 2 other points only when all three points are collinear	8
2811253666	congruent segments	line segments that have the same measure	9
2811253667	construction	A geometric drawing that uses a limited set of tools, usually a compass and straightedge.	10
2811255388	distance	Length of a path between two points	11
2811255830	midpoint	A point that divides a segment into two congruent segments	12
2811255831	segment bisector	a segment, ray, line, or plane that intersects a segment at its midpoint	13
2811256781	ray	a part of a line that starts at one endpoint and extends forever	14
2811256782	angle	A figure formed by two rays with a common endpoint	15
2811257130	vertex	A point where two or more straight lines meet.	16
2811257131	degree	a unit used to measure angles, equal to 1/360th of the circumference of a circle	17
2811257581	right angle	an angle that measures exactly 90 degrees	18
2811257582	acute angle	an angle that measures less than 90 degrees	19
2811258031	obtuse angle	an angle that measures greater than 90 degrees and less than 180 degrees	20
2811258032	adjacent angles	Angles that have a common side and a common vertex (corner point).	21
2811258621	linear pair	a pair of adjacent angles whose non-common sides are opposite rays	22
2811260067	vertical angles	two nonadjacent angles formed by two intersecting lines	23
2811260068	complementary angles	have a sum of 90 degrees	24
2811261161	supplementary angles	have a sum of 180 degrees	25
2811261162	perpendicular	Intersecting at or forming right angles	26
2811261602	polygon	A closed plane figure formed by three or more line segments that intersect only at their endpoints.	27
2811262051	vertex of a polygon	the point where two sides of a polygon meet	28
2811263657	equilateral polygon	a polygon with all sides congruent	29
2811263658	regular polygon	a polygon that is both equilateral and equiangular	30
2811264286	perimeter	The sum of the lengths of the sides of a polygon.	31
2811264287	circumference	The distance around a circle	32
2811264954	area	The number of square units needed to cover a given surface	33
2811265615	polyhedron	a solid figure bounded by plane polygons or faces	34
2811265616	face	a polygon side of a solid figure	35
2811266247	edge	The line along which two surfaces of a solid meet.	36
2811266826	prism	A solid figure that has two congruent, parallel polygons as its bases. Its sides are parallelograms	37
2811267575	pyramid	A solid shape with a polygon as a base and triangular faces that come to a point (vertex or apex)	38
2811267576	cylinder	a solid with congruent circular bases that lie in parallel planes	39
2811267946	cone	A solid figure that has a circlular base and a single vertex.	40
2811267947	sphere	A solid shape that is perfectly round like a ball. No faces, edges, or vertices.	40
2811269002	regular polyhedron	a convex polyhedron in which all of the faces are congruent regular polygons	41
2811269407	surface area	the sum of the areas of all the faces of a solid figure	42
2811269003	Platonic solid	a convex polyhedron in which all of the faces are congruent regular polygons	43
2811269879	volume	Amount of space an object takes up	44
2813983465	net	a 2-dimensional diagram that can be folded to forma a 3-dimensional shape	45