I am new to Sketchup so I may be doing something obviously wrong, but I donīt know what. When I use the rectangle tool plus typing in length,width in the dimension box I get anomolous results. Example: I click to start drawing the rectangle and then move the curser away. I type in , say, 10,20, hit return and release the mouse button. I wind up with a rectangle of say 12 3/32 by 17 1/16. The results are not always the same. I can try the same thing two or three time, typing in the same dimensions and will get different answers each time. I am using the woodworking template of inches. I have tried typing in " after the dimension numbers and "inch" also. Same results. I have tried variations of click and move away to start the rectangle then type dimensions in while holding the mouse button down, releasing the button then insert dimensions, hitting "return" before and after releasing mouse button etc. Just about every combination I can think of. Nothing works. I watch the Sketchup video tutorials and follow them step by step, but still no success.
Any help or suggestions would be most welcome.