Geometry Terms To Know Flashcards
Polygon
a simple closed curve made up of line segments.
Regular Polygon
a polygon in which all angles are congruent (equiangular) and all sides are the same length (equilateral).
Equiangular
all angles are congruent.
Equilateral
all sides are the same length
Congruent
Identical
Convex Polygon
Any plygon where a line segment joining any 2 points inside the polygon lies completely inside the polygon.
Concave Polygon
a polygon that is not convex; that is, there exists a line segment joining 2 points inside the polygon that does not lie completely inside the polygon.
What is the definition of a Triangle?
a three sided polygon
Define Scalene Triangle
all sides are of different lengths.
Define Isocelese Triangle
at least two sides are the same length.
Equilateral Triangle
all three sides are the same length.
Name these three shapes:
a. ) Scalene Triangle
b. ) Isoceles Triangle
c. ) Equilateral Triangle
Define Quadrilateral
a four sided polygon.
Define square
a quadrilateral with four equal sides and four right angles.
Define Rectangle
a quadrilateral with four right angles.
Define Parallelogram
a quadrilateral with both pairs of its opposite sides parallel.
Trapezoid
a quadrilateral with exactly one pair of parrallel sides.
Define Rhombus
a quadrilateral with four sides equal in length with no right angles. Exception: square.
Define Pentagon
a 5-sided polygon.
Define Hexagon
a 6-sided polygon.
Define Heptagon
a 7-sided polygon.
Define Octagon
an 8-sided polygon.
Define Nonagon
a 9-sided polygon.
Define decagon
a 10-sided polygon.
Define Undecagon
an 11-sided polygon.
Define Dodecagon
a 12-sided polygon.
a simple closed curve made up of line segments.
Polygon
a polygon in which all angles are congruent (equiangular) and all sides are the same length (equilateral).
Regular Polygon
all angles are congruent.
Equiangular
all sides are the same length
Equilateral
Identical
Congruent
Identical
Congruent
Any plygon where a line segment joining any 2 points inside the polygon lies completely inside the polygon.
Convex Polygon
Any plygon where a line segment joining any 2 points inside the polygon lies completely inside the polygon.
Convex Polygon
a polygon that is not convex; that is, there exists a line segment joining 2 points inside the polygon that does not lie completely inside the polygon.
Concave Polygon
a polygon that is not convex; that is, there exists a line segment joining 2 points inside the polygon that does not lie completely inside the polygon.
Concave Polygon
a three sided polygon
What is the definition of a Triangle?
a three sided polygon
What is the definition of a Triangle?
all sides are of different lengths.
Define Scalene Triangle
all sides are of different lengths.
Define Scalene Triangle