76 + 4 is 80... don't know what you're asking
Answer:
First find the area 72*63
A=4536
Then find the area 12*12
A=144
Then divide 4536/144
You would need 31.5 12 by 12in covers to decorate the rectangular region
As for the 6 by 6
You would need 126 album covers
As for the 9 by 9
You would need 51 covers
And as for the 15 by 15
You would need 20.6 covers
Answer: Can you explain more? you have to calculate it by an theorm
Step-by-step explanation:
Aas is not d triangle buddy