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A quadrilateral with exactly one pair of parallel sides.
A quadrilateral whose opposite sides are parallel and equal, or congruent.
a parallelogram with four equal sides and equal opposite angles.
Triangle with 2 equal sides and 2 equal angles.
A triangle with no congruent sides
A triangle with one right angle.
A triangle with three acute angles.
A triangle with one obtuse angle.
Triangle with a 90° angle
a closed figure made by joining line segments where each line segment intersects exactly 2 others
A polygon with 4 sides and 4 angles.
a 10-sided polygon
a convex polygon in which all sides and angles are congruent