Adding corner radius

I’m trying to add a corner radius to a 3/4 inch thick panel. I measure in 1" form the two side to find exact radius of arc. Then use arc tool to make a perfect arc on one side. Try to duplicate on the opposite side of panel and arc is out of round by 1/32 inch. Checked measurements several time - same result.

Share the SketchUp file so we can see what you are working with.

Once you’ve made the first radius, you can immediately thereafter dbl click on other corners to duplicate the arc exactly, inside or outside corners.

Thank you for responding and sorry i didn’t respond sooner, i’ll give it a try😊