Question 962691
A) 12 feet/3=4 feet Each side would be 4 feet.
A=(4 feet)(4 feet)=16 square feet 
ANSWER A): The area with all sides equal is 16 square feet.
B) L=length=side opposite garage=2W: W=width=side adjacent garage
L+2W=12 feet Substitute for L.
2W+2W=12 feet
4W=12 feet
W=3 feet
L=2W=6 feet
Area=(L)(W)=(6 feet)(3 feet)=18 square feet
ANSWER B): The area with side opposite twice as long is 18 square feet.
C)  L=length=side opposite garage=W+1: W=width=side adjacent garage
L+2W=12 feet Substitute for L.
(W+1)+2W=12 feet
3W+1=12 feet
3W=11 feet
W=11/3 feet
L=W+1=(11/3 feet)+(3/3 feet)=14/3 feet
Area=(L)(W)=(11/3 feet)(14/3 feet)=154/9 square feet=17.1 square feet
ANSWER C): The area with opposite side 1 foot longer is 17.1 square feet.