Nikita Yamada-Bagg

How come I am unable to trim a portion of a circle.

Discussion created by Nikita Yamada-Bagg on Nov 24, 2020
Latest reply on Nov 25, 2020 by Nikita Yamada-Bagg

Hi I am currently trying to follow this Youtube video. But I am unable to do the step when trying to trim the circle. The error I get is, "Cannot used a closed entity when trimming". Can someone please tell me how I can do this? I am completely new to solidworks. Thank you!

Creating Spur and Helical Gears - Tutorial - SOLIDWORKS - YouTube 

Step I am trying to do:

My drawing: