proofs
A ____ proof has statements on one side and reasons on the other
two-column
these triangles have two congruent sides
isosceles
the formula for the sum of the measures of a polygon
(n-2)180
parallel lines have ___ slope
the same
the "if" part of a conditional statement
hypothesis
a statement accepted as fact
postulate
an equilateral triangle is also
equiangular
the sum of the measures of the exterior angles of a polygon
360
vertical angles are
congruent
negate and switch the conclusion and the hypothesis
contrapositive
a mathematical statement requiring proof
theorem
sum of the measures of the angles of a triangle
180
the opposite sides are congruent and parallel
parallelogram
angles on opposite sides of the transversal between the parallel lines
alternate interior
switch the conclusion and the hypothesis
converse
a logical argument in which each statement is supported by fact
proof
longest side of a right triangle, opposite the right angle
hypotenuse
a quadrilateral with 4 equal sides
rhombus
angles outside the parallel lines on the same side of the parallel lines, supplementary
consecutive exterior angles
statement and its converse must both be true
biconditional statement
reasoning based on specific examples
inductive reasoning
the congruent sides of an isosceles triangle
legs
area of a rectangle
bh
perpendicular lines have
negative reciprocal slope
the "then" part of a conditional statement
conclusion