If you need to learn about shape names in English, this reference is perfect for you. It includes various types of shapes with clear definitions and useful example sentences.
This lesson will help you describe shapes in everyday conversations and understand what others are talking about. You will find sections covering lists of shapes, shape names with examples, types of shapes, and shape applications. Each section is designed to expand your knowledge and vocabulary in a logical and learner-friendly way.
Shape Names
What Are Shapes?
Shapes are geometric figures, or the pattern an outline falls into. Shapes are often drawn (whether by ink, pencil, or digitally), but they also occur in real life. When people hear the word shape, they usually think of 2D (two-dimensional) figures, so most of the objects in this lesson are 2D shapes, with a few common 3D shapes included as well.
List of Common Shapes
To make learning easier, the shapes below are arranged from fewer sides to more sides, followed by curved and symbolic shapes.
- Triangle
- Scalene triangle
- Right triangle
- Square
- Rhombus
- Parallelogram
- Pentagon
- Hexagon
- Heptagon
- Octagon
- Nonagon
- Circle
- Oval
- Heart
- Cross
- Arrow
- Star
- Crescent
- Cube
- Cylinder
Common Shape Names with Pictures and Examples
Triangle
A triangle is a polygon with three sides and three angles.
- The roof of the house has a triangular shape.
Scalene triangle
A scalene triangle is a triangle with no equal sides and no equal angles.
- The triangle with sides measuring 5 cm, 7 cm, and 9 cm is a scalene triangle.
Right triangle
A right triangle has one angle measuring 90 degrees, called the right angle.
- The ladder and the wall formed a right triangle.
Square
A square is a four-sided, flat shape with all sides equal in length and all angles measuring 90 degrees.
- The window in my room is a perfect square.
Rhombus
A rhombus is a four-sided, flat shape with all sides of equal length, and opposite sides parallel to each other.
- The diamond symbol on a playing card is shaped like a rhombus.
Parallelogram
A parallelogram is a four-sided shape with opposite sides that are parallel and equal in length.
- The floor tiles were arranged in a parallelogram pattern.
Pentagon
A pentagon is a polygon with five sides and five angles.
- The sign outside the school is in the shape of a pentagon.
Hexagon
A hexagon is a polygon with six sides and six angles.
- Honeycomb cells naturally form hexagon shapes.
Heptagon
A heptagon is a polygon with seven sides and seven angles.
- The badge on the police officer’s uniform had a heptagon shape.
Octagon
An octagon is a polygon with eight sides and eight angles.
- A stop sign is shaped like an octagon.
Nonagon
A nonagon is a polygon with nine sides and nine angles.
- Some decorative coins are designed in a nonagon shape.
Circle
A circle is a round, two-dimensional shape with no corners or edges.
- The sun appeared as a bright circle in the sky.
Oval
An oval is a two-dimensional shape that looks like a stretched circle.
- The swimming pool was shaped like an oval.
Heart
A heart is a symbolic shape often used to represent love or affection.
- She drew a heart on the card.
Cross
A cross is a shape formed by two lines intersecting at right angles.
- The church roof had a cross at the top.
Arrow
An arrow is a shape with a pointed end, often used to show direction.
- The arrow on the sign pointed left.
Star
A star is a shape with five or more points extending from the center.
- A star was placed on top of the Christmas tree.
Crescent
A crescent is a curved shape similar to a thin moon.
- A crescent moon appeared in the night sky.
Three-Dimensional Shapes
Cube
A cube is a three-dimensional shape with six equal square faces.
- The gift was wrapped in a cube-shaped box.
Cylinder
A cylinder is a 3D shape with two parallel circular bases and a curved surface.
- A soda can has the shape of a cylinder.
Types of Shapes
Two-Dimensional Shapes (2D)
Two-dimensional shapes are flat figures with length and width but no depth. Common 2D shapes include triangles, quadrilaterals, circles, and polygons.
Triangles
Triangles can be classified by sides or angles:
- Equilateral triangle: all sides and angles are equal
- Isosceles triangle: two sides and two angles are equal
- Scalene triangle: all sides and angles are different
By angles:
- Acute triangle
- Right triangle
- Obtuse triangle
Quadrilaterals
Quadrilaterals are shapes with four sides:
- Square
- Rectangle
- Parallelogram
- Rhombus
- Trapezium (UK) / Trapezoid (US)
- Kite
Circles
A circle is a round shape.
All points on a circle are the same distance from the center.
- A radius goes from the center to the edge.
- A diameter is twice the radius.
- The circumference is the distance around the circle.
Example: The sun looks like a circle.
Other Polygons
A polygon is a shape with straight sides.
Here are some common polygons:
- Pentagon – 5 sides
- Hexagon – 6 sides
- Heptagon – 7 sides
- Octagon – 8 sides
- Nonagon – 9 sides
Some polygons have equal sides and angles. These are called regular shapes. Others do not. These are called irregular shapes.
Three-Dimensional Shapes (3D)
3D shapes have length, width, and depth. They are not flat. You can hold them in your hand.
Polyhedra
Polyhedra are 3D shapes with flat faces.
Cube – 6 square faces
- Example: A dice is a cube.
Cuboid – faces are rectangles
- Example: A book looks like a cuboid.
Pyramid – a base and triangle sides
- Example: Some buildings look like pyramids.
Spheres and Hemispheres
A sphere is round and smooth.
- Example: A ball is a sphere.
A hemisphere is half of a sphere.
- Example: A bowl looks like a hemisphere.
Cylinders and Cones
A cylinder has two round ends and straight sides.
- Example: A soda can is a cylinder.
A cone has one round base and one point.
- Example: An ice cream cone is a cone.
Regular and Irregular Shapes
Regular Shapes
Regular shapes have all sides equal and all angles equal.
Examples:
- Equilateral triangle
- Square
- Regular pentagon
- Regular hexagon
Irregular Shapes
Irregular shapes do not have all sides and angles equal.
Examples:
- Isosceles triangle
- Scalene triangle
- Rectangle
- Parallelogram
- Rhombus (equal sides but unequal angles)
- Oval
Shape Applications
Mathematics and Geometry
Shapes are essential in mathematics and geometry. Some common formulas include:
- Area of a triangle: ½ × base × height
- Circumference of a circle: 2 × π × radius
- Area of a rectangle: length × width
These formulas are used in subjects such as physics, engineering, and architecture.
Shapes in Real Life
Shapes appear everywhere around us:
- Book – rectangular
- Ball – spherical
- Globe – spherical
- Dice – cube
- Moon – crescent (at certain times)
- Arrow – directional shape
- Star – decorative and symbolic shape
Shapes Names Video
Shapes are everywhere, and references to them appear frequently in daily life. After completing this lesson, you should feel more confident recognizing, describing, and using shape names in English accurately.