What is the surface area of a right cone with diameter of 15 units and a slant height of 34 units?

Question

k12girlohva · Answer

The curved surface area of the cone is 801.11 square units.

k12girlohva · Answer

http://www.answers.com/Q/What_is_the_surface_area_of_a_cone_with_a_diameter_of_15_units_and_a_slant_height_of_34_units

mathmale · Answer

Giving away answers with no explanation or involvement on the part of the learner is counterproductive and unhelpful.  What formula should @reymishia be using to calculate the surface area, and why?  We want reymishia to know where to look up such information herself in the future.

anonymous · Answer

I still need help on how they got the answer

anonymous · Answer

What formula do I use to get the answer?