PLEASE HELP I GIVE 20 POINTS

11. Perimeter = All Sides added together.

Remember there are two of each side with the expression.

Expression: 3b + 3b + b+a + b+ a

To simplify collect all like terms (ones with a common letter or are the same)

Simplified expression: 8b + 2a

You got the expression by adding all sides together then simplifying by collecting like terms.

I will do the rest as comments on this post.

Cwill be your correct answer

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )