You would use square metres (m2) to find the area of a door.
If it's a standard book, the standard units would probably be cm2.
Millimetres
You would find the area by multiplying the width by the length, so the area would be 216 square feet.
First convert the metric so that both measurements are in the same scale: 2 m= 200 cm or 120 cm= 1.2 m. Then multiply to find the area like you would normally: 2 m*1.2 m=2.4 m^2 or 120 cm*200 cm= 240 cm^2
all you do is find the area of the circle... if you mean find the squares area, find the area of the circle, and then the square's area and subtract the squares area to the circles area
To find the area of a book cover in metric units, the most appropriate unit to use would be centimeters. The formula for finding the area of a book cover would be: length x width.
square meter
Square meters.
Square metres
meters2
Square metre
A square nanometer.
Square meters, generally.
Square centimetre.
Square centimetres (cm2).
To find the area of the door, get its length and breadth measurements then multiply them.
cm for a reg. hb pencil it's about 1 cm