Two-Dimensional Shapes

a completely round, plain shape

She used a compass to draw a small circle on the map.

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

The artist used a triangle shape to create a dynamic composition.

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

In geometry class, they practiced calculating the area of a rectangle.

a diamond shape frame covered with a paper or cloth with a string attached to it that can fly in the wind

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

Each tile on the bathroom floor was a small square shape.

(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 triangle is the simplest type of polygon with three sides.

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

a triangle that does not have a right angle

I drew an oblique triangle with three slanted sides.

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

The sides of a scalene triangle are not equal in length.

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

In an isosceles triangle, the base angles opposite the equal sides are congruent.

a type of triangle with all three sides of equal length

Each side of an equilateral triangle is the same length.

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

The quilt had a pattern with acute-angled triangles.

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

An obtuse-angled triangle has one angle larger than a right angle.

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

any half of a circle

The children sat in a semicircle around the teacher during story time.

(geometry) a four-sided figure with opposite equal angles, forming a diamond shape

The pattern on the floor was made of blue and white lozenges.

a rectangular figure that has unequal adjacent sides with arched angles

The rug in the living room was an attractive oblong with intricate patterns.

rounded in shape but wider in one direction, such as the shape of an egg

The oval mirror hung above the dresser, reflecting the room's decor with its elegant curvature.