Question

The perimeter of a regular triangle,regular pentagon , regular hexagon, and regular octagon are respectively equal to 57 cm , 70 cm, 105 cm and 112 cm . which figure have sides w/ the longest measure?

Answer 1

begin wid calculating length of side for each figure

Answer 2

How ? O.o

Answer 3

Use this :
perimater = total length around the figure

Answer 4

il show yu how to compute length of side for triangle :

for a regular triangle of side s,
perimeter = s+s+s = 3s
=:>
3s = 57
s = ?

Answer 5

does that help/make sense @XxSecnirpxX

Answer 6

ohh Thanks ! :)

Answer 7

but what is the one with the longest measure? O.o

Answer 8

like we calculated the side of triangle,
you need to calculate sides of each polygon

once you have side lengths, you can compare them... good luck :)

Answer 9

Thanks! now i get it! ^_^

Answer 10

see if this makes sense :


side of triangle = perimeter/n = 57/3 = \(\textbf{19}\)
side of pentagan = perimeter/n = 70/5 = \(\textbf{14}\)
side of hexagan = perimeter/n = 105/6 = \(\textbf{17.xx}\)
side of octagan = perimeter/n = 112/8 = \(\textbf{14}\)

Answer 11

you can see it nw which side is longest.. .