How to select a button in a radial menu without having to click on it ?

I recently made 1 Radial menu and when I press the letter "X" there are several options for me to click, but I am using this to do things quickly, like casting a very fast spell or using a potion, but it takes a lot of time for me to click I tried to do one by myself, but it ended up very broken and only 4 options were selected from 10.

Could someone explain to me how I can select something on the radial menu just by taking the angle based on the center of the screen in 360 degrees.

Here is a exemple of what i want do : https://twitter.com/ArchRBX/status/825819491078639616

Sorry if i dont explained correctly , my English is bad :C