Raquel F.

asked • 04/01/19

Determine the radius of the circle that will make a base for the cone, and determine the total surface area of the cone (with the base).

The lateral portion of a cone (the part other than the base) is made from 1/4 of a circle of radius 8 inches (by joining radii). By calculating, determine the radius of the circle that will make a base for the cone, and determine the total surface area of the cone (with the base).

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Mark M. answered • 04/03/19

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Draw and label a diagram!

The curved portion is 4π in (The entire circumference is 16π. 1/4 is 4π)

The base has a circumference of 4π. Therefore the radius is 2π.

The lateral height is 8


Can you calculate the surface are from these measures?

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Hannah R.

Can you please elaborate more on this? At the end of the question it asks to explain your reasoning and I am still confused on the proportions of the cone. Thank you!
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04/16/21

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