Answer:
24 mm
Step-by-step explanation:
Since it is a right triangle, we can use Pythagorean theorem

where a and b are the legs, and c is the hypotenuse.
We know one of the legs is 10, and the hypotenuse is 26, so we can substitute 10 in for a, and 26 in for c.

Solve the exponents

Now, solve for b. To do this, get b by itself.
First, subtract 100 from both sides


Take the square root of both sides

b=24
So, the other leg is 24 mm