Math Problem Statement

Find the radius of a circle with an area of 262m^2. Round your answer to the nearest tenth.

Solution

The area AA of a circle is given by the formula:

A=πr2A = \pi r^2

Where:

  • AA is the area,
  • rr is the radius, and
  • π3.1416\pi \approx 3.1416.

We are given A=262m2A = 262 \, \text{m}^2. To find the radius rr, we rearrange the formula to solve for rr:

r=Aπr = \sqrt{\frac{A}{\pi}}

Substituting the given area:

r=262π=2623.1416r = \sqrt{\frac{262}{\pi}} = \sqrt{\frac{262}{3.1416}}

Let's calculate that.

r83.3929.13mr \approx \sqrt{83.392} \approx 9.13 \, \text{m}

Rounding to the nearest tenth, the radius is:

r9.1mr \approx 9.1 \, \text{m}

Would you like more details or have any questions?


Here are 5 related questions:

  1. How would the radius change if the area doubled?
  2. What is the circumference of the circle with this radius?
  3. How do you find the diameter of the circle using the radius?
  4. What would the area be if the radius were 12 m?
  5. How is the area of a circle related to its radius mathematically?

Tip: Remember, the radius is half of the diameter of the circle.

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Math Problem Analysis

Mathematical Concepts

Geometry
Circle
Square Roots
Area of a Circle

Formulas

A = πr^2
r = √(A/π)

Theorems

Area Theorem for Circles

Suitable Grade Level

Grades 6-8