You can also express as to get:
Any of theseformsof the equationcan be usedto find the surfacearea of a right cone.
Example 4
Find the total surfacearea of a right conewith a radiusofcm and a slantheightof
cm.
Use the formula:Example 5
Find the total surfacearea of a right conewith a radiusoffeet and an altitude(not slantheight)of
feet.