Answer:
B. 24
Explanation:
To find this, use Pythagorean Theorem
a^2+b^2=c^2
a is 10, and c is 26. We know 26 is the hypotenuse because it is opposite the right angle
10^2=b^2=26^2
100+b^2=676
Subtract 100 on both sides
b^2=576
Take the square root of both sides
b=24
Hope this helps! :)