A girls bike wheel broke and she needs to find the measurements of it to get the perfect replacement.
Oh No! My bike's wheel broke!
I need to buy the right sized part, but first I need to find the measure of the outside of the wheel, called the Circumference.
To find the circumference, you first need to know the radius. The radius is half of the measure of the diameter. The Diameter is a line from the left to the right, that divides the wheel into two equal halves.
The diameter is 12 inches. This means that the radius must be 6 inches! Now that we know the radius, we have to multiply it by Pi (3.1415…). When using Pi, you can use the first three digits to save time!
6 x 3.14 () = 19. The exact solution is too long so I rounded up to the nearest whole number which is 19.
The final step is to multiply your answer by 2 and you have the Circumference of your circle! Now that I know the circumference, I don’t have to worry about getting the wrong wheel for my bike!