Question
Question: The exradii r<sub>1</sub>, r<sub>2</sub>, r<sub>3</sub> of DABC are in H.P., then its sides a, b, c ...
The exradii r1, r2, r3 of DABC are in H.P., then its sides a, b, c are in –
A
G.P.
B
H.P.
C
A. P.
D
None of these
Answer
A. P.
Explanation
Solution
r1, r2, r3 are in H. P.
Ž =
+ r31
Ž =
+
Ž 2s – 2b = 2s – a – c
Ž 2b = a + c
Ž a, b, c are in A.P.