Question

What is the circumradius of a triangle whose sides are 7, 24 and 25 respectively?

• A. 18
• B. 12.5
• C. 12
• D. 14

Answer 1

The correct option is B 12.5

Option b
It’s important that we note that it is a Pythagoras triplet

7${}^2$ = 25${}^2$+24${}^2$

Now,

In a right-angled triangle, the median to the hypotenuse is half the hypotenuse and is also the circum radius of the triangle.

As the hypotenuse is 25, the circum radius is 12.5