10 terms

Gayle_SciroccoTEACHER

polygon

a closed plane figure whose sides are segments that intersect only at their endpoints

regular polygon

A polygon with equal angles and equal sides.

convex

A polygon is convex if any two interior points can be connected with a segment that lies completely within the polygon

concave

a polygon that is not convex

Trapezoid

A quadrilateral with exactly one pair of parallel sides

Parallelogram

a quadrilateral with both pairs of opposite sides parallel

Rhombus

A parallelogram with four congruent sides

rectangle

A parallelogram with four right angles

square

A parallelogram with four congruent sides and four right angles.

diagonal of a polygon

A segment that joins two nonconsecutive vertices of a polygon