Find the surface area of a square pyramid with base 9 ft by 9 ft and slant height 12 ft.
A. 90 ft^2
B. 45 ft^2
C. 171 t^2
D. 297 ft^2

@Nogarenshi

Question

Find the surface area of a square pyramid with base 9 ft by 9 ft and slant height 12 ft.
A. 90 ft^2
B. 45 ft^2
C. 171 t^2
D. 297 ft^2

@Nogarenshi

anonymous · Answer

This is my last question :)

anonymous · Answer

oh geez

anonymous · Answer

I did the formula, but I got an answer completely different from the choices above.

anonymous · Answer

ok with this you would need 2 formulas. you will need the pythagorean theorum and the formula for surface area for a square pyramid

anonymous · Answer

$$a^2+b^2=c^2$$

anonymous · Answer

yes and whats the surface area formula

anonymous · Answer

SA=2bs+b^2

anonymous · Answer

actually nevermind you dont need the pythagorean theorom

anonymous · Answer

Oh okay. so then It would be just $$SA=2(9)(81)+9^2$$

anonymous · Answer

plug in the numbers for SA formula so it should look lik this$$SA=2(9)(12)+9^2$$

anonymous · Answer

How'd you get 12???
OHHHH THAT'S WHAT I DID WRONG!!

anonymous · Answer

I plugged in the wrong number last time, that's why I had it wrong!!!

anonymous · Answer

hahahahaha S= slant hieght

anonymous · Answer

yep

anonymous · Answer

297ft^2!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

anonymous · Answer

yep!!!

anonymous · Answer

THANK YOU SO MUCH!!! YOU ARE THE BEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Good luck with college!!!

anonymous · Answer

tell me how you do

anonymous · Answer

@Nogarenshi I got a B!!!! :D My grade in the class went up! THANK YOU THANK YOU

anonymous · Answer

hahaha no problem but what were the questions that you got wrong?

anonymous · Answer

or was your overall class grade a B?