Chosen Solution

I have not used my tablet for awhile and don’t remember the pattern for security. How do i reset?

If you forgot your pattern, your device probably have secondary option to retrieve or open back your device. It could be your passcode or email field where to send you a guideline how to retrieve back to your device.

Yes but it crack in the of tablet it want let me lock it

If you have forgotten it, you might be able to factory reset it (but you will loose all your content and data) but this will allow you to use it again.