Timothy has a fenced-in garden in the shape of a
rhombus. The length of the longer diagonal is 24 feet,
and the length of the shorter diagonal is 18 feet.
What is the length of one side of the fenced-in
garden?
O
12 ft
15 ft
21 ft
108 ft

From the attached graphic we see that

rhombus side =   Sqr Root [(Long Diagonal / 2) ^ 2 + (Short Diagonal / 2) ^ 2]

rhombus side =   Sqr Root [(24/2)^2 + (18/2)^2]

rhombus side =   Sqr Root [144 + 81]

rhombus side =  Sqr Root (225)

rhombus side = 15 feet

Step-by-step explanation:

i hope this is what you were looking for.

see attached graph