Question 612509
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The Lateral Surface Area of a right circular cone is given by:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ L.A.\ =\ \pi{rh_s}]


Where *[tex \LARGE r] is the radius of the base and *[tex \LARGE h_s] is the slant height.


But you are given the height which is the measure of the distance from the center of the base to the apex of the cone.  You need the slant height which is the measure from a point on the circle that describes the base and the apex.  The radius and height form the legs of a right triangle and the slant height is the hypotenuse.  Calculate the slant height using Pythagoras.  Then plug in to the Lateral Area formula above.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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