2 ÷ 1/2 what is the answer

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Plz ( true - false) all triangles have interior angles whose measure sum to 90.