Please give information (like base area, height, etc.). I'd be happy to answer your updated  question. 

its a triangle
hmmm... you're sure it's not a square? by the way, if you want people to answer your questions, please give more pts. per question, like 10 or 15...
yes its a triangle pyramid with 4in...ok i will next me please my teacher is giving me so many to answer
you should learn how to solve the problems by yourself... don't just ask everything. instead, ask a concept if you don't understand.
i am trying..:-(