How Do You Calculate The Surface Area Of A Hemisphere?
A hemisphere is, essentially, half of a sphere. Surface area is the total exposed area of an object. The equation for the surface area of a hemisphere is 2πr^2 (where the symbol ^ represents that the number following it is an exponent). The surface area of a hemisphere is calculated by deducing the area of the flat, circular base of the object (πr^2) and then multiplying this number by two because the curved surface equals twice the area of the flat surface in a hemisphere. Determine the radius of the hemisphere by measuring the distance from the exact center on its flat side upwards to the very height of its shape. Take the radius and square it by multiplying the number by itself. For example, if the radius of a hemisphere is three, square it to make nine. Multiply this number by two. For example, 9 * 2 = 18. Multiply this product by π (pi), or 3.14 (a rounded numerical approximation of pi), to obtain the surface area of the hemisphere. For example, 18 * π = 56.52.
