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10 sides (decagon)

Step-by-step explanation:

You find the perimeter by adding up all the sides of a shape.

side + side + side + side... = perimeter

You know that each side is 4/5 centimeters. You also know that the perimeter is 8 centimeters.

You can set up an equation like this:

4/5 * number of sides = 8

or you can write it in a simpler form as:

4/5x=8

Now solve it like a normal equation:

5 * (4/5x) = (8) * 5

(4x) / 4=(40) / 4

x = 10

So, you know the shape has 10 sides that are 4/5 centimeters each.

step-by-step explanation:

there are 36 inches in a yard

25 : 36 = 0.69 yards (you can round to 0.70)

b and c

step-by-step explanation: