Here is how to calculate the radius of a circle, for example!
As you can see for this question, we used the distance formula from a different lesson to calculate the radius. This way we can count the radius of this circle and use it in the formulas designed for it!
This is another example! Here, it shows how we calculate the perimeter and area of the serving platter.
Here, we applied the formula for the perimeter of a rectangle, which is P = 2l + 2w!