How to find the surface area of a polyhedron

Practice Questions

ACT Math › How to find the surface area of a polyhedron

Questions

The surface area of a cylinder is given by $2\pi rh+2\pi r^{2}$ , where is the radius and is the height. If a cylinder has a surface area of $20\pi$ $cm^{2}$ and a height of , what is its radius?

If a half cylinder with a height of 5 and semicircular bases with a radius of 2, what is the surface area?

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