Chapter 6 Holt

17 terms

concave

a polygon in which no diagonal contains points in the exterior of the polygon.

convex

a polygon in which a diagonal can be drawn such that part of the diagonal contains points in the exterior of the polygon.

diagonal

a segment that connects any two nonconsecutive vertices of a polygon.

regular polygon

a polygon that is both equilateral and equiangular.

side of a polygon

one of the segments that forms a polygon.

vertex of a polygon

the common endpoint of two sides of the polygon.

base of a trapezoid

one of the two parallel sides of the trapezoid.

base angle of a trapezoid

one of a pair of consecutive angles whose common side is a base of the trapezoid.

trapezoid

a quadrilateral with exactly one pair of parallel sides.

midsegment of a trapezoid

the segment whose endpoints are the midpoints of the legs of the trapezoid.

leg of a trapezoid

one of the two nonparallel sides of the trapezoid.

isosceles trapezoid

a trapezoid in which the legs are congruent.

kite

a quadrilateral with exactly two pairs of congruent consecutive sides.

rectangle

a quadrilateral with four right angles.

square

a quadrilateral with four congruent sides and four right angles.

rhombus

a quadrilateral with four congruent sides.

parallelogram

a quadrilateral with two pairs of parallel sides.