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Vertex

Common endpoint of two sides of a polygon

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Diagonal

A segment that connects any two non-consecutive vertices

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Equilateral Polygon

All the sides of a polygon are congruent

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Equiangular Polygon

All the angles of a polygon are congruent

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Regular Polygon

A polygon that is both equilateral and equiangular

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A regular polygon is always _____

Convex

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Sum of Interior Angle Measures

(number of sides - 2) x 180 degrees

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The sum of the exterior angle measures of a convex polygon is ____

360 degrees

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A quadrilateral with two pairs of parallel sides

Parallelogram

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A quadrilateral with four right angles

Rectangle

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A quadrilateral with four congruent sides

Rhombus

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A quadrilateral with four right angles and four congruent sides

Square

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A quadrilateral with exactly two pairs of congruent consecutive sides

Kite

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A quadrilateral with exactly one pair of parallel sides

Trapezoid

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Each of the parallel sides of a trapezoid

Base

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The non-parallel sides of a trapezoid

Legs

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The two consecutive angles whose common side is a base

Base Angles

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A trapezoid whose legs are congruent

Isosceles Trapezoid

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The segment whose endpoints are the midpoints of the legs of a trapezoid

Midsegment of a Trapezoid

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Three acute angles

Acute Triangle

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Three congruent acute angles

Equiangular Triangle

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One right angle

Right Triangle

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One obtuse angle

Obtuse Triangle

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