How to find the cross-sectional area of a wire?
Understand the Problem
The question is asking how to calculate the cross-sectional area of a wire. This involves using the formula for the area based on the shape of the wire, typically a circle, and may require the diameter or radius of the wire.
Answer
π*r² or (π*d²)/4
The final answer is πr² or (πd²)/4
Answer for screen readers
The final answer is πr² or (πd²)/4
More Information
The cross-sectional area of a wire can be found using either the radius (r) or the diameter (d) of the wire. If using radius, the formula is A = πr². If using diameter, the formula is A = (πd²)/4. This relates to the geometry of a circle, as the cross section of a cylindrical wire is a circle.
Tips
A common mistake is confusing the diameter with the radius. Remember, the radius is half the diameter.
Sources
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