All you have to do is subtract 3/8 from 7 which would give you 9 and 1/3
It is 1/4 of the area of the larger triangle...basically if you connect the three midpoints of the triangle's sides it creates four identical smaller triangles...
The perimeter is one half of the larger triangle...
Answer : Surface area of pyramid = 4406832 square cm.
Explanation :
Since we have given that
Side of square base = 1212 cm
Slant height of pyramid = 1818 cm
As we know that ,


Now,

Hence, surface area of pyramid = 4406832 square cm.
It would be B. 68
I hope this help!