74.4k views
1 vote
The radius of a circle is 3 m. Find its area to the nearest tenth.

User Selmaril
by
7.8k points

2 Answers

6 votes

Answer:

28.3 m²

Explanation:

The area of a circle can be found using the following formula.


a=\pi r^2

We know the radius of the circle is 3 meters. We can substitute 3 m in for the variable, r.


a= \pi (3m)^2

Evaluate the exponent.

(3m)² = 3m * 3m= 9 m²


a= \pi (9 m^2)

Multiply pi and 9 meters squared.

9 m² * π = 28.2743339 m²


a=28.2743339 m^2

Round to the nearest tenth. The 7 in the hundredth place tells us to round the 2 in the tenth place to an 3


a\approx 28.3 m^2.

The area is approximately 28.3 square meters.

User Master Noob
by
7.7k points
7 votes

Answer:

28.3 square meters.

Explanation:

So we know that the radius of the circle is 3 meters. With that, we can figure out the area of the circle.

The area of a circle is given by the formula:


A=\pi r^2

Plug in 3 for r:


A=\pi (3)^2

Square the number:


A=9\pi

Use a calculator. Approximate:


A\approx28.2743\approx28.3

Therefore, the area of the circle is approximately 28.3 square meters.

User Yorch
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.