2d Shapes Names are important to learn because they are used in almost every chapter of Math. As an ESL Student, it is important that you learn 2D Shapes Names in English and understand them so you can be successful in Math.

There are many 2D shapes in English and they can be very confusing. The shapes below are listed in alphabetical order and will be a great addition to your math vocabulary and knowledge base.

Each shape has a name, English description, and also shows an image of each shape so you know what it looks like when identifying them in Math problems .

**Types of 2D Shapes:** There are many types of shapes, but we will only discuss some main ones such as Rectangle, Square, Triangle and Circle.

**Rectangle:** A rectangle is a four-sided polygon. It has four sides of equal length and all of its interior angles are right angles Sides: A rectangle has 4 sides Lengths: The lengths of the sides are equal to each other.

**Square:** A square is a regular quadrilateral; it is a four-sided polygon with four equal sides, and all of its interior angles are right angles.

**Triangle: **Triangle is a polygon that has three vertices or corners. Each internal angle of an equilateral triangle has measure 60 degrees , so in non-mathematic terms it means that all three angles inside of a triangle add up to create a straight line. A triangle has 3 sides, no more and no less. The lengths of the sides are not equal to each other. (3 different lengths)

**Circle:** Circle is a two-dimensional shape which looks like an “oval,” or circle in some cases. It is the set of all points in a plane that are at a given distance from a given point; thus we can say it is the curve traced by rims of circles whose centers are at the center of curvature.

**List of All 2D Shapes in English**

**Parallelogram**

A parallelogram is a four-sided shape. The opposite sides of a parallelogram are parallel and equal in length. It has four sides of equal length and all of its interior angles are right angles.

**Rectangle**

A rectangle is a parallelogram with four right angles. The opposite sides of a rectangle are parallel and equal in length. Sides: A rectangle has 4 sides Lengths: the lengths of the sides are equal to each other.

**Rhombus**

A rhombus is a parallelogram with four equal sides which means all side lengths are equal to each other, but it doesn’t mean that diagonals have to be the same length. The opposite sides of a rhombus are parallel and equal in length, but not necessarily perpendicular (90 degrees), because they don’t need to form right angles.

**Square**

A square is a shape that looks like a rectangle but all angles are 90 degrees. All four sides of the square are equal in length, and each angle is 90 degrees (a right angle).

**Trapezoid**

A trapezoid is a quadrilateral with only one pair of parallel sides. Sides: A trapezoid has 4 sides Lengths: The lengths of the sides are NOT equal to each other.

**Kite**

A kite is a quadrilateral with two pairs of adjacent, congruent, and parallel sides. Sides: A kite has 4 or more (it can be 6 or 8) if there are 6 or 8 it would not be called a KITE anymore it would be called ELLIPSE.

**Ellipse**

It is a closed curve which appears to be the outline of an oval. It is a two-dimensional shape which looks like an “oval,” or circle in some cases.

**Hexagon**

A hexagon is a polygon with six sides and six angles. There are three edges per side, so every two sides share one edge, adding up to 6 edges. Sides: A hexagon has 6 sides Lengths: The lengths of the sides are NOT equal to each other.

**Octagon**

An octagon is a polygon that has eight vertices or corners. Sides: An octagon has 8 sides Lengths: the lengths of the sides are not equal to each other.

**Dodecagon **

A dodecagon is any twelve sided polygon . Sides: Dodecagons have 12 equal length-sides. The lengths of the sides are equal to each other.

**Enneagon **

An enneagon is a 9-sided polygon . Sides: An enneagon has 9 sides Lengths: All the side lengths are NOT equal to each other. They can be different!

**Hexagram**

A hexagram is a shape formed by two overlapping triangles. It looks like a star, but it isn’t actually an official star because it doesn’t have enough points to be one. Sides: A hexagram has 6 sides Lengths: The lengths of the sides are not equal to each othe r. They can be different as well as long as they add up to six all together.

**Octagram**

An octagram is an eight-sided star polygon . Sides: An octagram has 8 sides. The lengths of the sides are equal to each other.

**Enneagram **

An enneagon is a 9-sided star polygon . Sides: An enneagon has 9 sides Lengths: All nine sides are equal in length, but they’re not necessarily straight. They don’t have to be the same length!

**Star**

A star is a shape where there are equal length sides and all interior angles are the same number of degrees. Sides: A star has 5 or more sides Lengths: The lengths of all sides are equal to each other.

**Nonagon**

A nonagon is an 9-sided polygon . Sides: A nonagon has 9 sides Lengths: The lengths of the sides are not equal to each other. They can be different as well as long as they add up to nine all together.

**Trapezoid**

A trapezoid is a quadrilateral with only one pair of parallel sides. Sides: A trapezoid has 4 or more (it can be 6 or 8) if there are 6 or 8 it would not be called a KITE anymore it would be called ELLIPSE.

**Polygon **

It’s any shape that has at least three straight-edged sides . Each side has the same length and each angle is the same number of degrees. Sides: A polygon can have more than three sides Lengths: The lengths of all of the sides are equal to each other, but this doesn’t mean they’re required to be all the same length.

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