Unit 7 Polygon Vocabulary Terms and Definitions
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15 Terms
Concave polygon
A polygon with one or more interior angles greater than 180°
Convex polygon
A polygon with all interior angles less than 180°
Exterior angle of a polygon
Angle on the outside of a polygon formed by the side and an extension of its adjacent side
Interior angle of a polygon
Angle on the inside of a polygon formed by pairs of adjacent sides
Irregular polygon
Polygon that is not equilateral or equiangular
Isosceles Trapezoid
A trapezoid with one pair of congruent sides called legs
Kite
A quadrilateral with two pairs of congruent sides adjacent to each other
Parallelogram
A quadrilateral with opposite sides parallel
Polygon
Any 2-dimensional shape formed with straight lines
Quadrilateral
A four-sided polygon
Rectangle
A quadrilateral with four right angles
Regular polygon
A convex polygon in which all sides and angles are congruent
Rhombus
A quadrilateral with four congruent sides
Square
A quadrilateral with four congruent sides and four right angles
Trapezoid
A quadrilateral with one pair of parallel sides
Note 
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