And if you want inch: Here is. 1 inch = 2.54 cm; 15 cm divided by 2.54 = 5.90 inches
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Area = pi*7.52 = 176.715 square cm rounded to 3 dp
Every person's body is made differently. So each person's trachea will be a different length and diameter. However the average trachea length is 9-15cm and the average diamter is 21-27mm See below for source
15*15 = 225 square centimetres.
There are no diameters for squares; let us just make that clear. Diameter only applies for circles (Line that goes through centre of circle and touches edges). However, diameters in squares would be simply length(but went through centre). Therefore it could be anywhere between 15-~21.2132. (Straight length/width or diagonal or anywhere else.) Hope this helps :D (I'm Australian-centre, not center)
Use Pythagoras' theorum a2 = b2 + c2 a2 = (9x9) + (12x12) 225 = 81 + 144 Ö225 = 15cm > 14cm. answer NO.