43 terms

# Geometry

#### Terms in this set (...)

linear pair
two angles that are both adjacent and supplementary
conclusion
"then" part of a conditional statement
trapezoid
quadrilateral with exactly one pair of opposite sides parallel
decagon
10 sided polygon
inscribed
polygon whose vertices lie on the circle
octagon
8 sided polygon
perpendicular
two lines that meet to form right angles
theorem
statement that must be proven true
4 sided polygon
angle bisector
segment that divides an angle into two congruent segments
rhombus
parallelogram with four congruent sides
postulate
statement assumed to be true
congruent
two polygons having the same shape and size
slope
ratio of rise over run
isosceles
triangle with two congruent sides
square
rectangle with four congruent sides
IFF
if and only if
median
segment from any vertex of a triangle to the midpoint of the opposite side
pentagon
5 sided polygon
rectangle
parallelogram with four right angles
parallelogram
quadrilateral with both pairs of opposite sides parallel
altitude
segment from the vertex of a triangle perpendicular to the line containing the opposite side
hypotenuse
longest side in a right triangle
coplanar
points that lie in the same plane
scalene
triangle with no congruent sides
obtuse
angle measure between 90 and 180
equilateral
triangle with all sides congruent
right
triangle containing one right angle
collinear
points that lie on the same line
CPCTC
corresponding parts of congruent triangles are congruent
similar
two polygons having the same shape
triangle
3 sided polygon
circumscribed
each side of a polygon is tangent to the circle
parallel
lines that lie in the same plane and do not intersect
tangent
a line that intersects a circle at exactly one point
diagonal
a segment joining two nonconsecutive vertices
hypothesis
the "if" part of a conditional statement
leg
sides of a right triangle
midpoint
a point in the middle of two points