How do I make a script which will teleport players to a certain part of the map?

I was trying to make a script that makes it so that when a player goes into a certain area of the map (like , a arena) it'll give them a weapon. ex. knife once they leave the area it'll disappear any tips or scripts

You can teleport players in various ways such as gui, or with a brick. Now to give the player weapons you can write in the script to copy weapons from ReplicatedStorage(I personally recommend) as they click the gui, or touch/click a brick to get teleported. I am not clear as to what you mean by leave? Leave as in physically leave the arena, which if that is the case then why do they need to be teleported? I will say that you mean die. If the person dies you can script to remove the weapons once a players health is less than 0. Hope that helps in tips wise.