2D Shape Calculators

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On this page you will find an introduction to 2D shapes in math and be able to access 2D shape calculators and tutorials to help with your understanding of what the "D shapes are and how their properties are calculated. You can also access our Math Tutorials and Math Calculators from the quick links below.

Making Geometry Fun and Accessible

Geometry doesn't have to be intimidating. By understanding the basic 2D shapes and using the right tools, you can not only solve geometric problems but also appreciate the beauty of shapes that surround us. Our suite of 2D shape calculators is designed to make learning and problem-solving in geometry both fun and accessible. So go ahead, explore, and let the shapes guide your way!


In mathematical terms, a 2D shape, or a two-dimensional shape, is a geometric figure that lies in a single plane. This means it has only length and width dimensions but no depth. Here's a more detailed description:

  1. Planar: 2D shapes are planar, meaning all points in the shape lie in the same plane.
  2. Dimensions: They have two dimensions - length and width. These dimensions are often referred to by different names depending on the specific shape (e.g., radius for circles, sides for polygons, etc.).
  3. Boundary and Interior: A 2D shape has a boundary, which is the outer edge of the shape, and an interior, which is the space enclosed by the boundary.
  4. Infinite Points: Each 2D shape consists of an infinite number of points that are positioned next to each other in such a way that they form the shape.
  5. Measurement of Area and Perimeter: Two fundamental properties of 2D shapes are area and perimeter. The area is a measure of the space enclosed by the shape, and the perimeter is the length of the boundary.
  6. Types: 2D shapes include various figures such as polygons (triangles, quadrilaterals, pentagons, etc.), circles, ellipses, and more complex figures like fractals and non-polygonal shapes.
  7. Euclidean Geometry: In mathematics, the study of 2D shapes falls under Euclidean geometry, named after the ancient Greek mathematician Euclid. This branch of geometry deals with the properties and relations of points, lines, surfaces, and shapes in a two-dimensional plane.

In short, a 2D shape is a flat geometric figure that extends in two dimensions, having length and width, and is defined by its boundary and the space it encloses within a single plane.

Discover the Magic of 2D Shapes: The Ultimate Guide to Geometric Figures and Calculations

Geometry is like a treasure chest filled with captivating shapes and fascinating patterns. At the core of geometry lies the world of 2D shapes, where imagination meets mathematics. Whether you are a student, teacher, or a curious mind, this article will serve as your compass through the intriguing landscape of 2D shapes. Additionally, you'll be able to solve geometric problems effortlessly with our suite of 2D shape calculators!

What are 2D Shapes?

2D shapes, or two-dimensional shapes, are flat figures that have length and width but no depth. They are the basic building blocks of geometry and can be simple like squares and circles or complex like polygons and fractals.

Common 2D Shapes

1. Square

A square is a shape with four equal sides and four right angles. Each interior angle is 90 degrees.

Area = side × side
Perimeter = 4 × side

2. Rectangle

A rectangle is similar to a square but with two sets of equal sides and four right angles.

Area = length × width
Perimeter = 2 × (length + width)

3. Circle

A circle is a set of points that are equidistant from a center point.

Area = π × radius²
Circumference = 2 × π × radius

4. Triangle

A triangle has three sides and three angles. The sum of the angles is always 180 degrees.

Area = ½ × base × height
Perimeter = side1 + side2 + side3

5. Parallelogram

A parallelogram has two pairs of parallel sides.

Area = base × height
Perimeter = 2 × (side1 + side2)

6. Trapezoid

A trapezoid has one pair of parallel sides.

Area = ½ × (base1 + base2) × height
Perimeter = side1 + side2 + base1 + base2

...and many more!

Shape Calculators: Your Geometric Toolkit

Navigating through the sea of geometric calculations can be daunting. Thankfully, our suite of 2D shape calculators is here to assist! Here's how they can help:

Area and Perimeter Calculators

Find the area and perimeter of various shapes in a jiffy! Just input the dimensions, and the calculator will do the rest.

Angle Calculators

Determine the angles within different polygons. Input the number of sides or use a protractor to measure angles and validate with the calculator.

Scale Factor Calculators

Need to enlarge or reduce a shape? Use the scale factor calculator to find new dimensions while maintaining the shape's proportions.

Coordinate Geometry Calculators

Find the distance between two points, the midpoint, or even the equation of a line using these calculators.

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