CK12 - Geometry

The figureis madeof one half sphereor hemisphere,and one cylinderwithoutits top.

Now find the area of the cylinderwithoutits top.

Thus,the total surfacearea is

Volumeof a Sphere

A spherecan be thoughtof as a regularpolyhedronwith an infinitenumberof congruentpolygonfaces.A
seriespolyhedrawith an increasingnumberof facesis shown.