How do i find the surface area of a square pyramid

Idk math. i need to fill in the missing numbers . due tommorow !

If the square of a positive integer is added to 2 times the integer the result is 48. find the integer.

In the figure below, segment ac is congruent to segment ab: which statement is used to prove that angle abd is congruent to angle acd? a.)triangle acd is similar to triangle abd. b.)triangle acd is congruent to triangle abd. c.)segment a.d. is congruent to segment ac. d.)segment a.d. is congruent to segment dc.