Area
The area of a figure measures the size of the region enclosed by the figure. This is usually expressed in terms of some square unit. A few examples of the units used are square meters, square centimeters, square inches, or square kilometers.
Area of a Square
If l is the side-length of a square, the area of the square is l2 or l × l.
Example:
What is the area of a square having side-length 3.4?The area is the square of the side-length, which is 3.4 × 3.4 = 11.56.
If l is the side-length of a square, the area of the square is l2 or l × l.
Example:
What is the area of a square having side-length 3.4?The area is the square of the side-length, which is 3.4 × 3.4 = 11.56.
Area of a Rectangle
The area of a rectangle is the product of its width and length.
Example:
What is the area of a rectangle having a length of 6 and a width of 2.2?The area is the product of these two side-lengths, which is 6 × 2.2 = 13.2.
The area of a rectangle is the product of its width and length.
Example:
What is the area of a rectangle having a length of 6 and a width of 2.2?The area is the product of these two side-lengths, which is 6 × 2.2 = 13.2.
###############################################################
The perimeter of a polygon is the sum of the lengths of all its sides.
Example:
What is the perimeter of a rectangle having side-lengths of 3.4 cm and 8.2 cm? Since a rectangle has 4 sides, and the opposite sides of a rectangle have the same length, a rectangle has 2 sides of length 3.4 cm, and 2 sides of length 8.2 cm. The sum of the lengths of all the sides of the rectangle is 3.4 + 3.4 + 8.2 + 8.2 = 23.2 cm.
Example:
What is the perimeter of a square having side-length 74 cm? Since a square has 4 sides of equal length, the perimeter of the square is 74 + 74 + 74 + 74 = 4 × 74 = 296.
No comments:
Post a Comment