in S.A.= 1/2lp+B is p the perimeter of the base? and in what order do i do them in?

Question

anonymous · Answer

do your own homework.

directrix · Answer

This looks as if it might be the formula for the surface area of a regular pyramid. 
If so, p is the perimeter of the base and L is the slant height of the pyramid. B is the area of the base of the pyramid. Depending upon which polygon is the base of the pyramid, the formula for B changes.
When you ask about order, I don't know what you are asking.
Think about posting the specific problem on which you are working.

anonymous · Answer

i just need to know about the p thank you

directrix · Answer

Suppose this were the problem. 

Find the surface area of a square pyramid with a base length of 5 cm, and a slant height of 10 cm.

S.A.= 1/2lp+B 
SA = (1/2) * (10)*p + B
The base is a square of side 5. A square has 4 equal sides so the perimeter of the base is 5+5+5+5 = 20.
And, B is the area of a square of side 5. Area of square = 5*5 = 25

So, SA = (1/2) * (10)*p + 25 becomes

SA  = (1/2) * 10 * 20 + 25
SA  = 125 square cm

I hope this helps.