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| 1. |
Define area of cross section |
| Answer» Most wire is made with a circular cross section of some particular radius and diameter. The area of that cross section is the well known A = pi*R² which is colloquially pronounced as “pie are squared.” We will put aside the old joke that “Pie are not squared; pie are round” but we have to admit to ourselves that expressing area and having to work with the irrational number “pi” can get numerically awkward. | |