If the lengths of the sides of a triangle are 15,20,25 units. Find the circum radius of the triangle

Length of sides are $\mathrm{a}=15\Rightarrow \mathrm{b}=20\to \mathrm{c}=25$
The triangle formed by above measurements is right triangle.
$\therefore \text{ circum radius }=\frac{1}{2}\times \text{ Hypotemuse }=\frac{1}{2}\times 25=12.5$