ophs

the hat of a clown is in the form of a cone. the slant height of the cone is 15cm and it makes the angle of 45 degree with the height of the hat. what is the diameter of clown's head ?

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  1. Draw a diagram. If the hat's radius is r, then

    r^2+r^2 = 15^2

    and the diameter is just 2r

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