The answer is acute angle. :)
You use saber to describe a fact, information, or how to do something.
And you use conocer to say that you are familiar with something either a person, place, or thing.
Basically saber means to know of something, and conocer means to be familiar with someting.
Comprenden (your last choice)
Answer:
Hola! encantado de ayudarte, donde está la imagen?
Explanation:
