In order to derive the base of a triangle from its area, you need its height as well.
In fact, if we solve the area formula for the base, we have

So, the base length would be

where h is the height relative to the base you're interested in.
A^2+b^2= c^2
3^2+4^2=c^2
9+16=c^2
25=c^2
5=c
Answer:
bxy and bac
Step-by-step explanation:
since line xy is parallel to ac the triangles are similar
64-25=39
All the square numbers are 1,4,9,16,25,36,49,64,81,100