Question 932422
The three points of peak, center of bottom, any point on edge of bottom, form a right triangle.  


x, radius of the bottom
y, height from center of bottom to peak
h, the hypotenuse using legs x and y


What is really wanted is the ratio {{{y/x}}}.


{{{x^2+y^2=h^2}}}, and only x is unknown.
{{{x=sqrt(h^2-y^2)}}}
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SLOPE is  {{{highlight(y/sqrt(h^2-y^2))}}}.
Substitute for y=2.5 and h=5.