Answer:
10 (if it is a right triangle)
Explanation:
it is a variation of special right triangle 3,4,5
for other right triangle use the equation:
![a^(2) +b^(2) =c^(2)](https://img.qammunity.org/2020/formulas/mathematics/college/ysyqcuv7zowodz5o2fvprirk5nq313c0wc.png)
c is the length of the hyponuse and a&b is the length for the 2 other sides.
it only work for right triangles.