SaiBook.us Geometry

Example

Title: Area of a Square

Grade: 4-a Lesson: S1-L5

Explanation: The best way to understand geometry is by looking at some examples. Take turns and read each example for easy understanding.

Examples:

Sonu is hanging a square picture frame with an area of \$144 cm^2\$. Find the side length of the frame.

Step 1a

Given that the Area(a) is 144 sq.cm

$1a$

Explanation: The area (a) is given as 144 square centimeters.

Step 1b

The formula for the area of the square is: Area(a) = side(s) x side(s)

We need to determine the side(s) by using formula 144 = \$s \times s\$

The square root of both sides of the equation to isolate the side length: \$\sqrt (144)\$ = \$\sqrt (s^2)\$

\$\sqrt(12^2)\$ =\$\sqrt (s^2)\$

Explanation: The formula for square area: Area = side x side.

To find side length: \$\sqrt (144)\$ = \$\sqrt (s \ times s)\$

Step 1c

After calculation side is 12 cm.

Explanation: The length of one side after calculation is 12 cm.