3. Use the figure of a square pyramid to answer the following questions

Question

3.	Use the figure of a square pyramid to answer the following questions

anonymous · Answer

I am going to draw the square pyramid really quick

anonymous · Answer

|dw:1404818559786:dw|

anonymous · Answer

What is the total surface area?
What is the volume?

yanasidlinskiy · Answer

Do you know what the formula is for surface area?

anonymous · Answer

Yes i think it is SA = 2bs * b^2

anonymous · Answer

just use the formula and plug in the variables, so  
SA=2(10)(13)*(10)^2

anonymous · Answer

Sa={130(2)}*100
SA=260*100
SA=26000

anonymous · Answer

Okay thanks! how would I find the volume?

anonymous · Answer

I believe that answer is wrong however, shouldn't it be equal to 360?

anonymous · Answer

For surface area? I don't believe that it will always equal 360, this is a three dimensional object and its area and surface area are completely different

anonymous · Answer

Yes but I used an online calculator and each time the total surface area of the object equal 360 cm

anonymous · Answer

Oh! my bad i think that the formula may have been incorrect, shouldn't it be SA=2bs+b^2?

anonymous · Answer

Yes

anonymous · Answer

sorry about that

anonymous · Answer

Haha its ok :) well then a correction to the work would have been 260+100 which indeed equals 360

texaschic101 · Answer

Volume = 1/3* b^2* h
V = 1/3 * 10^2 * 12
V = 1/3 * 100 * 12
V = 1/3 * 1200
V = 1200/3
V = 400