Trigonometric Equations Question 91
Question: If the sides of triangle are 13, 14, 15, then the radius of its incircle is
[EAMCET 1987]
Options:
A) $ \frac{67}{8} $
B) $ \frac{65}{4} $
C) 4
D) 24
Show Answer
Answer:
Correct Answer: C
Solution:
- $ s=\frac{1}{2}(a+b+c)=21 $ $ \Delta =\sqrt{[s(s-a)(s-b)(s-c)]}=84 $ ;
$ \therefore $ $ r=\frac{\Delta }{s}=4 $ .
BETA
