GEOMETRY (SA oftriangular pyramid)
posted by dull .
Find the surface area of a triangular pyramid with b =4 cm, h= 8.2 cm and s = 7 cm. PLEASE. How ?
GEOMETRY (SA oftriangular pyramid)  MathMate, Sunday, July 14, 2013 at 8:41am
Lateral surface area
=perimeter of base * apothem /2
=3b*s/2
(for a regular pyramid with a triangular base)
Area of triangular base with side b
=(√3)*b/2*(b/2)
=(√3)b²/4
GEOMETRY (SA oftriangular pyramid)  Anonymous, Sunday, July 14, 2013 at 10:05am
What is apothem ?
GEOMETRY (SA oftriangular pyramid)  Anonymous, Sunday, July 14, 2013 at 10:15am
why did you not include the height ?

In the calculations of surface area of a pyramid, the height is not required if the apothem (slant height) is given.
The height is required, however, to calculate the volume of a pyramid.
In fact, the height h is not consistent, because h should always be less than the slant height, s.
If you could check the question for typos, there may be a different answer.
Respond to this Question
Similar Questions

geometry
How do you find the lateral area and perimeter of a pentagonal pyramid? 
Math
VWXYZ is a rectanglebased pyramid where WX = 66 cm and XY = 32 cm. The vertex is vertically above the center of the base. GIven that the slant heights of VA and VB are 56 cm and 63 cm respectively, find the total surfact area of the … 
geometry
A pyramid has a square base with each side measuring 105.5 meters. The slant height of the pyramid is 65.5 meters. Find the lateral surface area of the pyramid. 
Geometry
The base of a regular pyramid is a hexagon whose sides have length 5 ft. If a lateral edge of this pyramid has length 9 ft, what is the surface area of the pyramid? 
Mathematics
OPQRS is a right pyramid whose base is a square of sides 12cm each. Given that the slant height of the pyramid is 15cm. Find the height of the pyramid, the volume of the pyramid, and the total surface area of the pyramid by first drawing … 
MATH
A regular triangular pyramid has an altitude of 9m and a volume of 46.8cu. meters. Find the length of the edges and the lateral area of the pyramid. 
geometry
The base of a pyramid is a square. The perimeter of the base is 20ft, and the surface area of the pyramid is 65ft^2. Find the slant height of the pyramid. 
Geometry
What is the surface area and lateral area of a regular triangular pyramid if the slant is 7 and the altitude is 5? 
GEOMETRY (SA oftriangular pyramid)
Find the surface area of a triangular pyramid with b =4 cm, h= 8.2 cm and s = 7 cm. PLEASE. How ? 
Geometry
Use the figure of a square pyramid to answer the following questions. a.) Find the total surface area of the pyramid. b.) Find the volume of the pyramid. Do not answer them. I know How to find the answer. Surface Area is squared right?