| Inside | On side (line) | Outside | Can not find it | |
| Right triangle | ||||
| Acute triangle | ||||
| Obtuse triangle | ||||
| Scalene triangle | ||||
| Isosceles triangle | ||||
| Equilateral triangle |
Your conclusion: _____________________________________________________________________________
_____________________________________________________________________________
Review: How about centroid, incenter, and orthocenter of a triangle?
2. How many points of circumcenter are there of a triangle?
1. When the point O of circumcenter is INSIDE of triangle ABC,
make a conclusion for the relationship between angle ABC and angle AOC,
angle BCA and angle BOC, or angle CAB and angle COB.
Conclusion:___________________________________
2. When the point O of circumcenter is OUTSIDE of triangle ABC
, make a conclusion for the relationship between angle ABC and angle AOC,
angle BCA and angle BOC, or angle CAB and angle COB.
Conclusion:___________________________________