Geometry in bmo & smc

Do orthocentres, circumcentres, excentres of triangles ever appear in these math challenges? (i know that incentres and centroid has came up before, but do they come up frequently?)

(edited 3 months ago)

Reply 1

mqb2766

Original post by yi123456

Do orthocentres, circumcentres, excentres of triangles ever appear in these math challenges? (i know that incentres and centroid has came up before, but do they come up frequently?)

Unlikely in smc and bmo1 which mainly relies on gcse circle theorems. Bmo2 may require circumcentre, centroid, orthocentre and incentre. Though a bit of basic knowledge about the incircle and circumcircle and how they relates to circle theorems/right triangles can come in handy.