Question

Sachiko is framing the border of a square picture. If she knows the area of the picture,

how could Sachiko determine the amount of framing material she needs to buy?

Answer 1

Amount of framing material she need to buy = 4a, where a is the side of square.

a is found out by taking square root of area of picture.

Step-by-step explanation:

Let the side of square be a. The area of a rectangle is breadth x width. Here breadth = width = side of square

Area of square = a x a =
`a^2`

It is given that area of picture is known, so she can find side of the square by finding square root of the area.

The perimeter of square is given by 4 times the side of square.

We know the side of the square, so we can calculate the perimeter.

Amount of framing material she need to buy = Perimeter of square = 4a