Area and Perimeter of Irregular Figures

The area of a figure is the amount of surface it covers. We measure area in square units

To find the area of an irregular figure, use a grid

To find the area of the figure, find the number of squares inside the figure

Count fully inside and almost fully inside squares as 1 each; about half filled as half each, and ignore the rest. The sum gives us the approximate number of squares

Area of the figure = Total number of squares inside the figure x Area of 1 square

Perimeter is the distance covered by the square lengths around a figure

Put your finger on one of the corners of the figure and mark your starting point

Count the number of square lengths along the border (outside) of the figure

Perimeter of a figure (P) = Number of square lengths along the border x Length of each