What does triangulate mean here?

I don't either, since there is no context. I suspect that 'triangulate' is used as a jocular emphatic for 'check', i.e. 'triangulate' means 'check very carefully'...perhaps.

There is another sentence too :"Start with a checklist and confirm your findings with triangulation."

You are not supplying enough context with your questions, nesa. Is this a book about mathematics or geology, for instance??

It also might be some newfangled professional educator's lingo.

http://www2.education.ualberta.ca/staff/olenka.bilash/Best%20of%20Bilash/Triangulation.html

Whether conducting assessment FOR learning or assessment OF learning, a teacher mu

Hi,

No one, Mister Micawber. I'm reading a book about packaging and it has lots of words that are used as a metaphor which is are really challenging for me.

Hi,

I really thank you.
I just found something

Triangulation of data in qualitative research as a means of validating results.Use different sources of information and triangulate data by looking for outcomes agreed upon by all stakeholders

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nesaSo does it mean CONCLUDE? or I'm wrong?

No, it means to conduct a formal process of agreeing certain hypotheses, gathering information, and analysing the information with respect to the hypotheses. The idea is that the data comes from different sources and can either verify or refute the hypothesis. I would call it formalized investigation.