ABC is a triangle with the angles less than 90o. AA1, BB1, CC1 are altitudes of this triangle. CC1 crosses A1B1 at point P. M is a midpoinf of A1B1. Prove that A, B, M and P are on the circle.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.