Math Problem Statement

The circumference of a circle is 48.356 meters. What is the circle's area? Use ​𝜋 ≈ 3.14 and round your answer to the nearest hundredth.

Solution

To find the area of the circle, we can break the problem into two parts:

Step 1: Find the radius of the circle.

The formula for the circumference CC of a circle is: C=2πrC = 2\pi r Where rr is the radius and π\pi is approximately 3.14.

We are given that the circumference is 48.356 meters, so: 48.356=2×3.14×r48.356 = 2 \times 3.14 \times r

Solving for rr: r=48.3562×3.14=48.3566.287.7metersr = \frac{48.356}{2 \times 3.14} = \frac{48.356}{6.28} \approx 7.7 \, \text{meters}

Step 2: Find the area of the circle.

The formula for the area AA of a circle is: A=πr2A = \pi r^2 Now that we know the radius is approximately 7.7 meters, we can substitute that into the area formula: A=3.14×(7.7)2=3.14×59.29186.22square metersA = 3.14 \times (7.7)^2 = 3.14 \times 59.29 \approx 186.22 \, \text{square meters}

Final Answer:

The area of the circle is approximately 186.22 square meters.

Would you like more details on how to calculate the area, or is there anything you'd like me to clarify? Here's a list of related questions that might interest you:

  1. How do you calculate the area of a circle without using π\pi?
  2. What is the relationship between the diameter and the radius of a circle?
  3. How would the area change if the radius were doubled?
  4. What other methods can you use to approximate π\pi?
  5. How does the circumference relate to the area in terms of units?

Tip: If you're solving similar problems, remember that the circumference and area formulas are derived from each other, so understanding both can help simplify the process!

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Math Problem Analysis

Mathematical Concepts

Geometry
Circle Area
Circle Circumference

Formulas

Circumference formula: C = 2πr
Area formula: A = πr^2

Theorems

Properties of circles

Suitable Grade Level

Grades 6-8