Question

The radius of circle is 2.12metre .Its area according to the rule of significant figures is

Answer 1

Area=Pie r^2
Pie 2.12^2
Pie 4.4944

Answer 2

Answer:

• The required area of the circle would be 4.4944π.
• If the value of pi(π) is taken as 3.14 the exact area of the circle would be 14.1 m².

Step-by-step explanation:

We have been given that radius of circle 2.12 m.

We have to find the area of circle according to the rule of significant figures.

• Radius of Circle = 2.12 m

The formula for area of a circle is given by = pi(π)*radius (r)²

In this given question,

The radius (r) is given as 2.12 m.

Therefore, the area of circle would can be calculated as follows: = π*r² units

• Area of Circle = πr² units
• Area of Circle = π(2.12)² m²A
• rea of Circle = 4.4944π m²

If the value of π is taken as 3.14 the exact area of the circle would be:

= 4.4944 * 3.14 m²

= 14.11 m²  

If we find the area of circle in the form of Significant figures, the exact area of the circle would be:

= 14.1 m²

Therefore, The required area of the circle is 14.1 m².