Answer:
On the net, the side length a is 9 feet.
On the net, the side length b is 7 feet.
The area of one of the triangular faces is 21 ft2.
The total amount of fabric needed to make the tent is 231 ft2.
9, 7, 21, 231
Explanation:
Hm, I am pretty dumb to explain but I just guessed and got them right.
Don't tell me I answered the wrong question T^T