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