I found what I perceive to be a great tool for the shop, an app for Android tablets, called Geometry Pad. Besides being free, there is an upgrade version for a small fee.
What I found it useful for is assisting me in determining angles and lengths for project components. I just completed a creche or manger for my son, in my usual manner of working projects – without plans. This manger has a peaked roof in the middle, so plugging in the desired length of the front and the height of the peak, this app provides the remaining dimensions & angles. If you desire, you can work from angles rather than the lengths of material on hand, or you can alter the sketch by dragging a point, to check for other angles or lengths to suit your needs.
The app looks like this:
Some of the description is as follows:
Sample as I used it: by simply tapping on a point or line, all pertinent data is provided in a pop-up screen.
Hope this helps others, there’s nothing to lose as it is free and it can be deleted if not.
-- "I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The point is to bring them the real facts." - Abraham Lincoln