Find the area (in sa unit) of rectangular ABCD 15 10 12 8
Answers
Answer:
Length of the rectangle = Area of the RectangleBreadth of the Rectangle
Breadth of the rectangle = Area of the RectangleLength of the Rectangle
Consider the following rectangle PQRS of length PQ = 3 cm and breadth = QR = 5 cm.
Rectangle Area
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Here the area of each smaller square is 1 sq.cm. There are 15 squares in PQRS. So, its area is sq. cm. In the given rectangle, there are 5 squares along the length PS and 3 squares along the breadth PQ. When we multiply 5 and 3, length and breadth of the rectangle PQRS, we get 15 which is the area of the rectangle PQRS.
Hence, area of a rectangle = length × breadth
A = l × b
Where A is the area and l and b are length and breadth of a rectangle.
Consider the following figures:
(i)
Area of a Rectangle
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Area of each small square = 1 sq cm
Area of rectangle in figure 1 by counting the squares = 6 sq. cm
Area = 6 square cm
Length of rectangle = 3 cm
Breadth of rectangle = 2 cm
Area = 3 × 2 = 6 sq. cm
(ii)
Area of a Rectangle
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Area of each small square = 1 sq cm
Area of rectangle in figure 2 by counting the squares = 10 sq. cm
Area = 10 square cm
Length of rectangle = 5 cm
Breadth of rectangle = 2 cm
Area = 5 × 2 = 10 sq. cm
Hence, area of rectangle = length × breadth
A = l × b where, A is the area, l and b are length and breadth of a rectangle.
Let us find the area of a rectangle having length 5 cm and breadth 4 cm.
Area of Rectangle
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From the above figure, it is clear that we can divide this rectangle into 20 squares of sides 1 cm each. So, the area = 20 cm2
Thus the area of the rectangle = 5 cm × 4 cm
= 20 cm2
So when we multiply its length and breadth we get the area of the rectangle.
Answer:
Area of rectangle in SI units: A=W×L