The basic area formulas for the following figures are,
1) Rectangle;
The formula for the area of a rectangle is given below;
[tex]\text{Area of a rectangle= length }\times width[/tex]
2) Square: The square is a quadrilateral that has all its sides equal.
The formula for the area of a square is given below;
[tex]\text{Area of a square = length}\times length=l^2[/tex]
3) Triangle; This is a three- dimensional figure.
The formula for the area of a triangle is given below;
[tex]\text{Area of a triangle=}\frac{\text{1}}{2}base\times height[/tex]
