Math Problem Statement
he diameter of a circle is 11 cm. Find its area to the nearest teNTH PLACE
Solution
To find the area of the circle, we use the formula for the area of a circle:
where:
- is the area,
- is approximately 3.1416, and
- is the radius of the circle.
The radius is half of the diameter. Given that the diameter is 11 cm, we find:
Now, we can calculate the area:
So, the area of the circle to the nearest tenth is approximately 95.0 cm².
Would you like to explore more details about this calculation, or have any other questions? Here's a list of related questions:
- How would the area change if the diameter was 15 cm instead?
- How do you derive the formula for the area of a circle from its circumference?
- What other ways can you calculate the area of a circle if you know the perimeter?
- What is the relationship between the radius, diameter, and circumference of a circle?
- How would the area change if you doubled the radius of the circle?
Tip: The formula for the area of a circle can also be expressed using the diameter directly: .
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Math Problem Analysis
Mathematical Concepts
Geometry
Circles
Area Calculation
Formulas
A = πr²
r = d / 2
Theorems
Formula for the area of a circle
Suitable Grade Level
Grades 6-8