Find the length of side a.
Help plz due now will give brainliest

Answer:
Well lets thing about this ?
its a right angle
and the sides are the same. So i would say 13
Step-by-step explanation:
Since the triangle is a right angled triangle,
(13)²=(5)²+a²
= 169-25=a²
= 144=a²
= 12 units =a