Question | Answer |
Triangle | A polygon with three sides |
Quadrilateral | A polygon with four sides |
Pentagon | A polygon with five sides |
Hexagon | A polygon with six sides |
Heptagon | A polygon with seven sides |
Octagon | A polygon with eight sides |
Nonagon | A polygon with nine sides |
Decagon | A polygon with ten sides |
Diagonal | A segment that connects two non-adjacent vertices of a polygon |
Legs | The nonparallel sides of a trapezoid |
Bases | The parallel sides of a trapezoid |
Trapezoid | A quadrilateral with only one pair of parallel sides |
Vertex | The point where two sides of a polygon meet |
Rectangle | A parallelogram with four right angles |
Rhombus | A parallelogram with four congruent sides |
Square | A polygon that is both a rhombus and a rectangle |
Isosceles Trapezoid | A trapezoid with 2 congruent legs |
Equilateral | A polygon with all congruent sides |
Equiangular | A polygon with all congruent angles |
Regular | A polygon with all congruent angles and sides |
Concave | A polygon that is not convex; it appears to have a dent in it |
Convex | A polygon where no line that contains a side of the polygon that passes through the interior of the polygon |
Exterior angles of a polygon or Interior angles of a quadrilateral | 360 degrees |
Interior angles of a triangle | 180 degrees |
Interior angles of any polygon | (number of sides - 2) x 180 |
Polygon | A figure that is 1) flat 2) closed 3) formed by 3 or more straight sides |
Side | A segment that form a polygon |
Parallelogram | A quadrilateral formed by two pairs of parallel sides |
Midsegment | A segment formed by connecting the midpoints of the legs of a trapezoid; it is parallel to the bases |
Interior Angles | The angles on the inside of a polygon |
Exterior Angles | The angles formed on the outside of a polygon by extending the sides of a polygons into rays |
Base Angles | Angles formed between the base and leg of a trapezoid |