Details Title: 07 geometry midterms vocab Description: ch 1- 6 Total Flash Cards: 78 Created: 12/21/2007 06:14:11		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 congruent Definition two figures have the same shape and size Term similar Definition two figures have the same shape Term line symmetry/ reflection symmetry Definition if a figure can be divided into two identical parts, there can be more than one line of symmetry Term midpoint Definition bisects a line segment into two shorter segments of equal length Term real number line Definition one-dimensional system n which points hav a single cordinate Term coordinate plane Definition two-dimensional system in which points have two coordinates Term slope Definition m, rise/ run= y2- y1/ x2- x1 Term parallel Definition coplanar lines that do not intersect Term perpendicular Definition if the two slopes' product is equl to -1 Term perimeter Definition the length around a figure Term area Definition the amount of area in an figure Term adjacent Definition if two angles share a common vertex and side, but have no common interior points Term segment bisector Definition is a segment, ray, line, or plane that intersects a segment at its midsegment Term angle bisector Definition a ray that divides the angle into two congruent angles Term conditional statement Definition if- then statement Term hypothesis Definition the "if" in the if- then statement Term conclusion Definition the "then" in the if- then statement Term converse Definition interchanging the hypothesis and the conclusion of a conditional statement Term counterexample Definition the hypothesis is true and the conclusion is not Term bicontional statement Definition if the statement is equivalent to the conditional statement and the converse, using "if and only if" Term addition property Definition if a= b, then a+ c= b+ c Term subtraction property Definition if a= b, then a- c= b-c Term multiplication property Definition if a= b, then ac= bc Term division property Definition if a= b and c doesn't =0, then a/ c= b/c Term reflexive property Definition a= a Term symmetric property Definition if a= b, then b= a Term transitive property Definition if a= b and b= c, then a=c Term substitution property Definition if a= b, then a may be substituted for b in an equation or and expression Term reflexive property of congruence Definition any geometric object is congruent to itself Term symmetric property of congruence Definition if one geometric object is congruent to a second, and the second object is congruent to the first Term trnsitive property of congruence Definition if one geometric object is congruent to a second, and the second object is congruent to a third, then the first object is congruent to the third object Term vertical angles Definition if two angles' sides form two pairs of opposite rays Term linear pair Definition if two adjacent angles' noncommon sides are opposite rays Term complementary Definition if two angles' sum of their measures is 90 degrees Term supplementary Definition if two angles' sum of measures is 180 degrees Term intersecting lines Definition are coplanar and have exactly one point in common Term oblique lines Definition intersecting lines meeting at a right angle, they are perpendicular Term skew lines Definition two lines that do not lie in the same plane Term negation Definition the hypothesis and the conclusion both become negative Term contrapositive Definition the negation of the converse Term trnsversal Definition a line that intersects two or more coplanar lines at different points Term vector Definition a quantity that has both magnitude and a diretion Term equilateral triangle Definition has three congruent sides Term isosceles triangle Definition has two or more congruent sides Term scalene triangle Definition has no congruent sides Term acute triangle Definition has three acute angles Term equiangular triangle Definition if all angles of an acute triangle are congruent Term right tringle Definition has exactly one right angle Term obtuse triangle Definition has exactly one on=btuse angle Term legs of a right triangle Definition the sides of the traingle that form the right angle Term hypotenuse of a right angle Definition the side opposite the right angle Term legs of an isosceles triangle Definition the two congruent sides Term base of an isosceles triangle Definition the third side of the triangle that isn't congruent to the other two sides Term congruence methods Definition - ASA - SAS - SSS - AAS not - AAA - SAA Term CPCTC Definition corresponding parts of congruent triangles are congruent Term perpendicular bisector of a triangle Definition a segment that bisects one side of the triangle Term angle bisector of a triangle Definition a segment that bisects one of the angles of the triangle Term median Definition a segment whose endpoints are a vertex and the midpoint of the other side Term altitude Definition a segment from a vertex that is perpendicular to the opposite side or to the line containing the opposite side Term circumcenter Definition the concurrent point of perpendicular bisectors, equidisdant from all the vertices Term incenter Definition concurrent point of the angle bisectors, equidistant from the three sides of the triangle Term Definition Term centroid Definition concurrent point of the medians, two- thirds of the distance from each vertex to the midpoint of the opposite side Term orthocenter Definition concurrent point of the altitudes Term midsegment Definition connects the midpoints of two sides of a triangle Term polygon Definition a plane figure that is formed by three or more segments called sides Term convex Definition if no line that contains a side of the polygon contains a point in the interior of the polygon Term nonconvex/ concave Definition not a convex Term diagonal Definition a segment that joins two nonconsecutive vertices Term regular Definition if a polygon is equilateral and equiangular Term parllelogram Definition quadrilateral with two pairs of parallel opposite sides Term rhombus Definition a parallelogram that has all four sides congruent Term rectangle Definition a parallelogram that has four right angles Term square Definition a parallelogram that is both a rectangle and a rhombus Term trapezoid Definition a quadrilateral that has exactly one pair of opposite sides that are parallel Term Definition Term isosceles trapezoid Definition the legs of the trapezoid are congruent Term kite Definition a quadrilateral that has two pairs of consecutive congruent sides, but opposite sides are not congruent