Area
The area of an 2D shape would be the total size of its surface. Area is measured in square units such as square centimeters ( \(cm^2\) ), square inches ( \(in^2\) ) etc..
Area of Common Shapes
Let's look at how to calculate the area of the shapes below:
Triangle
The area of a triangle with height h and base b, is calculated by:
\(A = \cfrac{1}{2} b h\)
Square
The area of a square with length s is calculated by:
\(A = s^2\)
Rectangle
The area of a rectangle with length l and base b, is calculated by:
\(A = b \cdot l\)
Circle
The area of a circle with radius r is calculated by:
\(A = \pi r^2\)
Trapezoid
The area of a trapezoid with sides a, b, c, d and height h is calculated by:
\(A = \cfrac{1}{2} (a + c ) h\)
Parallelogram
The area of a parallelogram with side length a, base length b and height h is calculated by:
\(A = b \cdot h\)