Angle Bisector and Incentre

Q. From the figure, what does OC represents?

1. Angle bisector of $\angle 80°$
2. Angle bisector of $\angle 40°$
3. Angle bisector of $\angle 20°$
4. Angle bisector of $\angle 160°$

Q. What is an incentre?

1. Point of concurrence of all medians in triangle.
2. Point of concurrence of all angle bisectors in triangle.
3. Point of concurrence of all altitudes in triangle.
4. ​​​​​The center of a triangle's circumcircle.

Q. Match the special lines of a triangle given on the left with the name of their point of intersection.

1. centroid
2. incentre
3. orthocentre

Q.

In the figure shown below, $\angle$ABD = $\angle$DBC, then the ray BD is called ________.

1. angle bisector

2. perpendicular bisector
3. median
4. altitude

Q. All three angle bisectors of a triangle meet at its _______.

1. circumcentre
2. incentre
3. supercentre
4. orthocentre

Q.

The point of intersection of angle bisectors is called the ______.

1. circumcentre

2. orthocentre

3. centroid

4. incentre