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21 Cards in this Set
 Front
 Back
a parallelogram

both pairs of opposite sides parallel
oppsite angles congruent opposite sites congruent adjacent angels supp diagonals bisect eachother one diagonal creates two congruent triangles 

a rectangle

all properties of a parallelogram
one right angle> all right angles diagonals are congruent 

a rhombus

properties of a parallelogram
all sides congruent interection of diagonals is perpendicular both diagonals biusect rhomubs angles diagonals create 4 right triangles 

a square

prop of a parallelogram
prop of rectangle prop of a rhomubs diagnoalsfour isosceles right triangles 

a kite

two distinct pairs of consecutive sides
diagonals perpendicular one diagonal bisects the opposite angles one diagonal bisected 

a trapezoid

exactly one pair of parallel sides (bases)


an isosceles trapezoid

all prop of a trapezoid
non parallel sides congruent lower base angles congruent upper base angles congruent diagonals are congruent 

ifthen

statement is hypothesis then conculsion...conditional statement


hypothesis

if then that is true


conclusion

part of the ifthen that must be true if the hypothesis is true


linear pair of angles

a pair of adjacent angles wholes noncommon rays form a straight line


linear pair property

if two angles are linear pair then the sum of angles is 180


vertical angles

vertical angles are angles opposite one another at the intersection of two lines


vertical angles theorem

vertical angels congruent


supplementary angles

sum 180


complementary angles

90 degrees


interior angles, exterior angels alternate interior angles, exc.

only if two parallel lines cut by a transversal


acute angle

less than 90


obtuse

measure greater then 90 and less than 180


converse

restatement of an ifthen statement where hypothesis and conclusion switched


triangle inequality theorem

sum of the lengths of any two sides oc a triangle is greater than the length of the third side
