Colors and Shapes - Two-Dimensional Shapes

Read this lesson to learn the names of some two-dimensional shapes in English, such as "kite", "square" and "oval".

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circle

[noun]

a completely round, plain shape

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

triangle

[noun]

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

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

rectangle

[noun]

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

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

kite

[noun]

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

square

[noun]

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

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

trapezoid

[noun]

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

parallelogram

[noun]

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

rhombus

[noun]

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

polygon

[noun]

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

Ex: A triangle is the simplest type of polygon with three sides.

right triangle

[noun]

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

oblique triangle

[noun]

a triangle that does not have a right angle

Ex: I drew an oblique triangle with three slanted sides.

scalene triangle

[noun]

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

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

isosceles triangle

[noun]

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

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

equilateral triangle

[noun]

a type of triangle with all three sides of equal length

Ex: Each side of an equilateral triangle is the same length.

acute-angled triangle

[noun]

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

Ex: The quilt had a pattern with acute-angled triangles.

obtuse-angled triangle

[noun]

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

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

rhomboid

[noun]

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

semicircle

[noun]

any half of a circle

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

lozenge

[noun]

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

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

oblong

[noun]

a rectangular figure that has unequal adjacent sides with arched angles

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

oval

[noun]

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

Ex: The artist painted an oval in the center of the canvas for emphasis.

Colors and Shapes
Shades of Black	Shades of Blue	Shades of Azure	Shades of Cyan
Shades of Gray	Shades of Dark Brown	Shades of Light Brown	Shades of Dark Green
Shades of Light Green	Shades of Magenta	Shades of Orange	Shades of White
Shades of Yellow	Shades of Pink	Shades of Red	Shades of Purple
Words Related to Colors	Two-Dimensional Shapes	Three-Dimensional Shapes	Polygons

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