Can someone help me with this

Translate this to spanish .sometimes a (un) teacher is mean.

An angle is formed by the union of twolinesline segmentsplanes

"in english, write six to eight sentences comparing cultural aspects of greetings in spanish-speaking countries with greetings in your own culture. use what you learned in the lessons to tell about three differences and three similarities. discuss non-verbal greetings and how respect is shown. you may also include verbal greetings, but do not simply translate phrases from one language to another."