Colors and Shapes - Two-Dimensional Shapes

a completely round, plain shape

(geometry) a flat shape consisting of three straight sides and three angles

(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other

a four-sided shape with two pairs of equal-length adjacent sides

a shape with four equal straight sides and four right angles, each measuring 90°

(geometry) a flat shape with four flat sides, two of which are parallel

(geometry) any flat shape with four straight sides, the opposite sides of which are equal and parallel to each other

(geometry) a flat shape with four equal sides in which opposite angles are equal

(geometry) a flat shape consisting of three or more straight sides

a flat geometric shape consisting of three straight sides and one right angle

a triangle that does not have a right angle

a type of triangle that has all three sides of different lengths

a type of triangle that has two sides of equal length and two angles of equal measure

a type of triangle with all three sides of equal length

a type of triangle in which all three angles are less than 90 degrees

a type of triangle that has one angle greater than 90 degrees

(geometry) a parallelogram with four straight sides and no right angles

any half of a circle

(geometry) a figure with four sides and two opposite angles more than 90° and two of less than 90°

a rectangular figure that has unequal adjacent sides with arched angles

a shape that is wide in the middle and narrow at both ends