PLEASE HELP! plato unit activity independent and conditional probability. if you can find the answers to any of the questions on this activity i’d appreciate it so much

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

Question and answers are in the attached picture. you so much in advance.

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β