Mathematics
Grade6
Easy

Question

# Calculate the area of the rectangle whose coordinates are A (2, 3), B (8, 3), C (2, 5), D (8, 5)

Hint:

## The correct answer is: 12

### The given coordinates of the rectangle are:A is (2,3)B is (8,3)D is (8,5)C is (2,5)We have to find the length of the adjacent sides of rectangle ABDC. We need be careful about the points.To find the length we will use the following criteria:1) If x coordinate is same, we will find the absolute distance using y coordinate. An absolute distance is the length of the point from the respective axis. If x coordinate is same then its length is measured from x axis. It is a positive quantity.2) If y coordinate is same we will use the x coordinate to find absolute distance.3) If the points are in same quadrant, we will have to subtract the absolute distances to find length.4) If the points are in adjacent quadrants, we will have to add the absolute distances to find length.We will consider the side AB as length and BD as breadth.A and B have same signs so they are in same quadrant. And B and D have same signs so they are in same quadrant.We will find the length of side AB.For the points A and B, y coordinate is same. We will find the absolute distance using x coordinate. It is distance from y axis.Absolute distance of the point A = |2|Absolute distance of the point B = |8|Length of AB = |8| – |2|= 8 – 2= 6Length of the rectangle is 6 units.We will find the length of side BDFor the points B and D, x coordinate is same. We will find the absolute distance using y coordinate. It is distance from x axis.Absolute distance of the point B = |3|Absolute distance of the point S = |5|Length of BC = |5| - |3|= 5 – 3= 2Breadth of the rectangle is 2 units.The formula for area of rectangle is (length × breadth)Area of rectangle ABCD = (length × breadth)= (6 × 2)= 12 unitsTherefore, area of the rectangle is 12 units.

For such questions, we have to see if the points of the rectangle are in same quadrant or adjacent quadrants. We can use distance formula to find the length of sides of rectangle too.