I really need help like I'm so serious..I need major help with these IXL's...

For the inequality |c| < |d| to be true, which of the following must be true?

Which geometric principle is used to justify the construction below?

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.