4 equal (congruent) sides. 90 degree angles.
A parallelogram with 4 right angles.
A polygon with 4 sides
A special angle formed by perpendicular lines and with a measure of 90 degrees.
3 sides and 3 angles. (3-sided polygon)
3-sided polygon, 1 angle greater than 90 degrees
An angle that has a measure that is greater than 90 degrees and less than 180 degrees.
3 sided triangle(polygon) with at LEAST 2 congruent(equal) sides.
A triangle with 3 congruent sides. (3-sided polygon-it also has three 60 degree angles).
A quadrilateral with 2 pairs of parallel sides.
Lines or figures in a plane that never intersect.
A quadrilateral with exactly one pair of parallel sides.
same size, same shape
A parallelogram with 4 congruent(equal) sides.
vertex or vericies
The point where 2 or more rays meet; the point of intersection of 2 sides of a polygon; the point of intersection of 3 or more edges of a 3-dimensional figure.
enclosed figure; 2D; 3 or more line segments.
An angle that has a measure less than a right angle (90 degrees)
Used to describe a polygon with at least one angle measuring more than 180 degrees.
A quadrilateral with no parallel sides, two pairs of contruent sides, 1 line of symmetry, and all vertices are convex
Angles that touch only at their vertex and share the same lines as sides.
Two lines that intersect to form right angles.
having the same shape, but not necessarily the same size
An angle that has a measure of 180 degrees
A quadrilateral with exactly one pair of parallel sides