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Learn about the different properties and types of polygons, including parallelograms, trapezoids, quadrilaterals, and regular polygons. Understand concepts such as diagonals, medians, and concavity.
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Geometry Unit Five Word Bank Diagonal A segment from one vertex to another vertex in a polygon. Isosceles Trapezoid A trapezoid with congruent legs. Median (of a trapezoid) A segment from the midpoint of one leg to the midpoint of the other leg in a trapezoid. Its length is the average of the lengths of the two bases of the trapezoid. Midsegment Another name for the median of a trapezoid.
Geometry Unit Five Word Bank • Parallelogram • A quadrilateral with two pairs of parallel sides • Rectangle • A parallelogram with four right angles • Rhombus • A parallelogram with four congruent sides • Square • A parallelogram with four right angles and four congruent sides
Geometry Unit Five Word Bank • Trapezoid • A quadrilateral with exactly one pair of parallel sides • Quadrilateral • A four-sided polygon • Polygon • A closed shape made up of line segments • Regular Polygon • A polygon that has all congruent sides and all congruent angles.
Geometry Unit Five Word Bank • Convex Polygon • A polygon where the extension of no sides enters the polygon • Concave Polygon • A polygon where the extension of one or more sides enters the polygon • Pentagon • A five-sided polygon • Hexagon • A six-sided polygon
Geometry Unit Five Word Bank • Heptagon (Septagon) • A seven-sided polygon • 18. Octagon • An eight-sided polygon • 19. Nonagon • A nine-sided polygon • Decagon • A ten-sided polygon
Geometry Unit Five Word Bank • Dodecagon • A twelve-sided polygon • N-gon • An N-sided polygon