Math assignment I need help ASAP

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

How to do this , and can some one explain