find a appropriate formula for the area of a narrow circular ring

Answer 1

This is not very definitive;
narrow circular ring: washer? wedding band make of circular wire? flat circular ring made of horizontal flat stock rolled in a circle?

Answer 2

wedding band made of circular wire

Answer 3

find a appropriate formula for the area of a narrow circular ring....wedding band made of circular wire

Answer 4

ok. a donut, or torus. Take notes, stop the lecture as you digest, then go on.

https://www.youtube.com/watch?v=tMVwXglUp60

Answer 5

i am so depress

Answer 6

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