Closed figure with straight sides
4- sided polygon
A quadrilateral with only one set of parallel lines
A quadrilateral with two sets of parallel lines
A parallelogram (two sets of parallel sides) with all sides the same length
A parallelogram (two sets of parallel sides) with four right angles, opposite sides are of equal length
A rhombus (2 sets of parallel lines, all sides of equal length) with four right angles
A triangle that has all angles less than 90° (90° is a Right Angle)
A triangle that has a right angle (90°)
A triangle that has an angle greater than 90°
A triangle with all three sides of equal length.
All angles are acute.
A triangle with two equal sides.
The angles opposite the equal sides are also equal.
A triangle with all sides of different lengths.
All angles are different, too.
10- sided polygon