ab and ac are tangents at b and c to a circle. d is the mid point of the minor arc bc with respect to the triangle abc,d is the
options
1)orthocenter 2)circumcentre 3)incentre 4)centroid
Idk but here is a page that you can probably work it out from :)
http://www.mathopenref.com/triangleincenter.html
+238 
