A true scale map of the world is a 2D scaled representation of the surface area of the world. Therefore the total surface area of a sphere call it SA is. Surface area 4 p r2 square units.
The formula depends on the type of the solid.
The area of the whole surface is then obtained by adding together the areas of the pieces using additivity of surface area. In the figure above drag the orange dot to change the radius of the sphere and note how the formula is used to calculate the surface area. R 0 displaystyle rho 0 the only solution of. Find the surface area of a cylinder with a radius of 2 cm and a height of 5 cm.