Question

Help plz ..............

Answer 1

First I would find the base, which is a square so 10x10=100
then find the triangle (a=1/2bh) a=1/2(12)(10) a=1/2(120) a=60
since there are four triangle sides do 60x4 which equals 240, so  then add the sides to the base 100+240=340, the answer is A