Question

What are the steps used to construct a triangle orthocenter?

Answer 1

Do you know how to construct perpendiculars?

Answer 2

No

Answer 3

Refer back to Euclid. http://aleph0.clarku.edu/~djoyce/java/elements/bookI/propI11.html

Answer 4

Also see http://www.mathopenref.com/triangleorthocenter.html
and http://www.mathopenref.com/constorthocenter.html

Answer 5

do these tell me the steps?

Answer 6

Yep.
Do you actually have straightedge and compass so you can practice it on paper? That will help you get the best understanding and help you explain it better in your own words.