Octagon has 8 sides. If each side is 1 centimeter then the perimeter which is the sum of all sides is,

1+1+1+1+1+1+1+1=8 centimeters.

25.75+15.49+9.95=51.192) Tai went to a shoping mall he spent $25.75 on a shirt 15.49 on a hat and 9.95 on a poster before tax was 8.25%on all purchases what was the total cost of Tai's purchase including Tax?

Now add 8.25 precent of that.

8.25% of 51.19 = .0825 x 51.19 = 4.223175

Now add (only need 2 digits because cents are up to 2 digits)

4.22 + 51.19 = 55.41