Hii guys I need help with this I took a screenshot of it. I WILL GIVE YOU 18 POINTS JUST PLS HELP THANKS (:

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.