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All 43 terms

TermDefinition
linear pairtwo angles that are both adjacent and supplementary
conclusion"then" part of a conditional statement
trapezoidquadrilateral with exactly one pair of opposite sides parallel
decagon10 sided polygon
inscribedpolygon whose vertices lie on the circle
octagon8 sided polygon
perpendiculartwo lines that meet to form right angles
theoremstatement that must be proven true
quadrilateral4 sided polygon
angle bisectorsegment that divides an angle into two congruent segments
rhombusparallelogram with four congruent sides
postulatestatement assumed to be true
congruenttwo polygons having the same shape and size
sloperatio of rise over run
isoscelestriangle with two congruent sides
squarerectangle with four congruent sides
IFFif and only if
mediansegment from any vertex of a triangle to the midpoint of the opposite side
pentagon5 sided polygon
rectangleparallelogram with four right angles
parallelogramquadrilateral with both pairs of opposite sides parallel
altitudesegment from the vertex of a triangle perpendicular to the line containing the opposite side
hypotenuselongest side in a right triangle
coplanarpoints that lie in the same plane
scalenetriangle with no congruent sides
obtuseangle measure between 90 and 180
equilateraltriangle with all sides congruent
righttriangle containing one right angle
collinearpoints that lie on the same line
CPCTCcorresponding parts of congruent triangles are congruent
similartwo polygons having the same shape
triangle3 sided polygon
circumscribedeach side of a polygon is tangent to the circle
parallellines that lie in the same plane and do not intersect
tangenta line that intersects a circle at exactly one point
diagonala segment joining two nonconsecutive vertices
hypothesisthe "if" part of a conditional statement
legsides of a right triangle
midpointa point in the middle of two points
adjacentangles that have a common side and vertex
SupplementaryAngles that add to 180
complementaryangles that add to 90
acuteangle measure between 0 and 90

Set Information

Terms 43
Creator tfrederick
Created April 24, 2009
Groups None
Subject geometry vocabulary
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Most Missed Words

  1. linear pair two angles that are both adjacent and supplementary - 12 misses
  2. diagonal a segment joining two nonconsecutive vertices - 10 misses
  3. adjacent angles that have a common side and vertex - 8 misses
  4. parallel lines that lie in the same plane and do not intersect - 7 misses
  5. parallelogram quadrilateral with both pairs of opposite sides parallel - 6 misses
  6. circumscribed each side of a polygon is tangent to the circle - 6 misses
  7. hypothesis the "if" part of a conditional statement - 5 misses