Question

calculate the area of regular flat surface like a rectangular cardboard using a graph paper​

Answer 1

Explanation:

the rectangular cardboard is placed on a centimeter graph sheet and it outline is drawn then the number of complete square occupied by the cardboard are counted. Let the number of small square be ' X ' 9 then the area of the rectangle is

Area of rectangle = X x area of square

= X x 1 cm = x cm

Alternate method

If we use the formula for the area of rectangle .

for X ÷ length = 8 cm and breath = 4 cm

Area of rectangle = length X breath

= 32