How to find the perimeter and area of an octagon with a radius of 8

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?