It seems you've uploaded a few images that appear to be related to a lesson on the perimeter, area, and circumference of circles, including how to calculate the circumference using formulas like $C = \pi d$ or $C = 2\pi r$, and some exercises related to this.

Would you like me to help you solve the exercises or explain any part of the lesson further? If you'd like, I can assist with determining the circumference of the circles in the "Try This" section of your document!

Let me know how you'd like to proceed!