Answer: 12.5
Step-by-step explanation:
If you use the pythogorean theorem (a²+b²=c²), you can figure out what the length is.
1) find measures of sides b and c.
b(base)=10
c(hypontenuse)=16 because you have to double XV.
your formula comes out to be: a²+10²=16²
2) now to find a.
a²+10²=16²
a²+100=256
-100 -100
a²=156
√a²=√156
a≈12.5
