C-08-Q211mediumsingle_mcq
The centre of an ex-circle is the intersection of—
The centre of an ex-circle is the intersection of—
- athe three internal angle bisectors
- bone internal bisector and two external bisectors of the other angles
- cthe perpendicular bisectors of the sides
- dthe medians
ব্যাখ্যা
An ex-circle centre must be equidistant from one side and the extensions of the other two, which requires the internal bisector of one angle together with the external bisectors of the other two. Their intersection gives the excentre.