Math Problem Statement
Lily used a compass to draw a circle as shown in the figure above. What was the circumference of the circle? (Take π as 3.14)
Solution
To find the circumference of the circle, we can use the formula:
Where:
- is the circumference
- is approximately 3.14
- is the radius of the circle
From the image, we see that the radius .
Substituting the given values:
Thus, the circumference of the circle is .
Would you like any further details or clarifications? Here are some related questions:
- How is the formula for the circumference of a circle derived?
- What are some other formulas related to circles?
- How would the circumference change if the radius were doubled?
- What is the difference between the circumference and the area of a circle?
- How can you calculate the area of a circle using its radius?
Tip: Remember that is an irrational number, so it is often approximated as 3.14, but its exact value has infinite decimal places.
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Math Problem Analysis
Mathematical Concepts
Geometry
Circles
Circumference
Formulas
Circumference formula: C = 2πr
Theorems
Properties of Circles
Suitable Grade Level
Grades 5-6