Geometry Flashcards

7157202245	Collinear	Points that lie on the same line	0
7157202246	Linear Pair	A pair of adjacent angles whose noncommon sides are opposite rays.	1
7157202247	Supplementary angles	Two angles whose sum is 180 degrees	2
7157202249	Vertical Angles	A pair of opposite congruent angles formed by intersecting lines	3
7157202250	Angle addition postulate	If P is in the interior of	4
7157202251	Segment addition postulate	If B is between A and C, then AB + BC = AC	5
7157202252	Congruent	Having the same size and shape	6
7157202253	Angle bisector	a ray that divides an angle into two congruent angles	7
7157202254	Segment bisector	a segment, ray, line, or plane that intersects a segment at its midpoint	8
7157202255	Midpoint	A point that divides a segment into two congruent segments	9
7157202260	parallel lines	lines in the same plane that never intersect	10
7157202261	conditional statements	A statement that can be written in if-then form.	11
7157202262	hypothesis	A testable prediction, often implied by a theory An educated guess	12
7157202263	conclusion	A summary based on evidence or facts	13
7157202264	triangle sum theorem	The sum of the measures of the interior angles of a triangle is 180 degrees	14
7157202265	Transitive property	If a=b and b=c, then a=c	15
7157202266	Substitution property	If a=b, then a can be substituted for b in any equation or expression	16
7157202267	Line segment	A part of a line with two endpoints	17
7157202268	Line	1. A long thin mark on a surface. 2. A continuous extent of length, straight or curved, without breadth or thickness; the trace of a moving point. 3. Long, narrow mark or band.	18
7157202270	transversal	a line that intersects two or more coplanar lines at different points	19
7157202271	corresponding angles	Angles formed by a transversal cutting through 2 or more lines that are in the same relative position.	20
7157202272	same side interior angles	two interior angles on the same side of the transversal	21
7157202273	same side exterior angles	two exterior angles on the same side of the transversal	22
7157202274	alternate interior angles	angles between 2 lines and on opposite sides of a transversal	23
7157202275	alternate exterior angles	Angles that lie outside a pair of lines and on opposite sides of a transversal.	24
7157202276	Acute triangle	A triangle that contains only angles that are less than 90 degrees.	25
7157202277	Obtuse triangle	A triangle with one angle that is greater than 90 degrees.	26
7157202278	Right triangle	a triangle with one right angle	27
7157202279	Isosceles triangle	a triangle with at least two congruent sides	28
7157202280	Equilateral triangle	A triangle with three congruent sides	29
7157202281	Regular triangle	All congruent sides and angles	30
7157202282	Scalene triangle	a triangle with no congruent sides	31
7157202284	Vertex angle	The angle formed by the legs of an isosceles triangle.	32
7157202286	slope formula		33
7157202287	slope intercept form of a line		34
7157202288	y-intercept	The point where the graph crosses the y-axis	35
7157202289	altitude of a triangle	the perpendicular segment from a vertex to the opposite side or to the line that contains the opposite side	36
7157202290	perpendicular bisector of a triangle	A line that is perpendicular to a segment at its midpoint.	37
7157202291	SAS postulate	If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent.	38
7157202292	SSS postulate	If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent.	39
7157202294	AAS postulate	If two angles and a non-included side of one triangle are congruent to two angles and a non-included side of another, then the two triangles are congruent.	40
7157202295	HL Postulate	If a hypotenuse and leg of one right triangle are congruent to the corresponding hypotenuse and leg of a second right triangle, then the triangles are congruent.	41
7157220232	Quadrilateral	A flat shape with four straight sides. (closed)	42
7157221731	rhombus	A quadrilateral where all sides have equal length. It is a type of parallelogram.	43
7157222220	kite	A quadrilateral that has two pairs of sides that are equal in length but not all 4 are equal.	44
7157222941	square	A quadrilateral where all sides have equal length, and every interior angle is a right angle (90 degrees). Special rectangle.	45
7157223607	rectangle	A quadrilateral where all angles are right angles (90°). Also opposite sides are parallel and of equal length.	46
7157224422	trapezoid	A quadrilateral that has a pair of opposite sides parallel.	47
7157233873	regular polygon	A polygon is regular when all angles are equal and all sides are equal (otherwise it is "irregular").	48
7157234599	irregular polygon	A polygon that does not have all sides equal and all angles equal.	49
7157237810	Parallelogram	A quadrilateral with two pair of parallel sides	50
7157241578	perpendicular lines	Lines that intersect to form right angles	51
7157243506	adjacent angles	Two angles that share a common side and have the same vertex	52
7157247126	coplanar	points that lie on the same plane	53
7157248148	complementary angles	Two angles whose measures add to 90 degrees.	54
7157248964	distance	How far it is from one point to another	55
7157251752	ray, opposite rays	a part of a line that starts at one endpoint and extends forever	56
7162803717	Pythagorean Theorem	In a right angled triangle: the square of the hypotenuse is equal to. the sum of the squares of the other two sides.	57
7162806937	Chord	a straight line segment whose endpoints both lie on the circle.	58
7162809724	Tangent	is a line that touches the circle at exactly one point, never entering the circle's interior.	59