railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Mensuration Plane Figures
a, b and c are the sides of a right triangle with c as hypotenuse. The radius r, of the circle which touches the three sides of the triangle is :
1
r = \(\frac{(a - b + c)}{2}\)
2
r = \(\frac{(a + b - c)}{2}\)
3
r = \(\frac{(a + b + c)}{2}\)
4
r = \(\frac{(a - b - c)}{2}\)