Plot the points (0,0),(0,4),(3,4),(3,0) in graph sheet. Join the points with straight lines to make a rectangle. Find the area of the rectangle.
Let, A(0,0),B(0,4),C(3,4),D(3,0) be the respective points.
Thus, on plotting the points, rectangle ABCD is obtained.
Now, AB=3−0=3 units and
AD=4−0=4 units
Hence, area of the rectangle ABCD=AD×AB=3×4=12 sq. units.