Advertisements
Advertisements
प्रश्न
Describe the graphical method to find the area of an irregularly shaped plane figure.
उत्तर
To find the area of an irregularly shaped plane figure, we have to use graph paper.
- Place a piece of paper with an irregular shape on a graph paper and draw its outline.
- To find the area enclosed by the outline, count the number of squares inside it (M).
- You will find that some squares lie partially inside the outline.
- Count a square only if half (p) or more of it (N) lies inside the outline.
- Finally count the number of squares, that are less than half. Let it be
For the shape in figure we have the following:
M = 50
N = 7
P = 4
Q = 4
Now, the approximate area of the can be calculated using the following formula.
Area of the leaf = `"M"+(3/4) "N" + (1/2) "P"+1/4 "Q sq.cm"`
= 52 + 5.25 = 58.25 sq.mm = 0.5825 sq.cm
APPEARS IN
संबंधित प्रश्न
How is the unit of hectare related to the S.I. unit of area?
Which of the following is a derived quantity?
The area of a leaf can be measured using a ______.
Match the following items.
| Column 1 | Column 2 | ||
| 1. | Area | a. | light year |
| 2. | Distance | b. | m3 |
| 3. | Density | c. | m2 |
| 4. | Volume | d. | kg |
| 5. | Mass | e. | kg/m3 |
Use the analogy to fill in the blank
Area : m2 :: Volume : ______
The formula to calculate area of a rectangle is ______.
______ is a derived quantity.
One square metre is the area enclosed inside a square of side 2 metre.
Area is a derived quantity as we obtain by multiplying twice of the fundamental physical quantity length.
Mention the formula to calculate the area of a circle?
