Thanks for any help!

Point H is an orthocenter in a triangle ABC. All 3 altitudes intersect at point H.

∠BAC + ∠HCA = 90 degrees

There is a 99% chance this is wrong

Really??? Why don't you draw this triangle, as I did, and prove to your self that I'm wrong?

Btw, I have confidence in my 1%

For some reason it showed you as a guest and they always get it wrong. Sorry!