Creating a object with two 45 degree attached to two objects

I am trying to create a support for a table leg. I would like for the support to have a 45 degree on the leg and the base. I just can’t get my head around this; I am new to Sketchup. I am using the free web-based version.
thanks

Just rotate the shape to 45 deg then chop it off.
GIF 15-03-2025 12-33-32 AM

Thanks, I was not drawing the new lines on the base and the leg. I really appreciate you help.