If the Greek root metron means “measure,” what does symmetrical mean? measured before measured after measured together

answer:

Measured together.

Explanation:

 Symmetry is the property of remaining invariant under certain changes. In everyday language it refers to a sense of harmonious and beautiful proportion and balance.

explanation: the line "to save the day, harry must get past a scary three-headed guard dog" from the summary best justifies the conclusion that harry potter and the sorcerer’s stone was influenced by ancient greek mythological literature. the three other choices had nothing to do with ancient greek literature - and the words "three-headed guard dog" are what makes that choice the correct answer.