I tried getting the anglebetweenPart A and Part B, Did I do it correctly? The angle it outputted was 48 degrees

Here is the code:

local Key1 = game.Workspace.PartA
local Key2 = game.Workspace.PartB
local PosDiff = Key1.Position - Key2.Position
local XDiff = math.abs(PosDiff.X) -- 61.71
local ZDiff = math.abs(PosDiff.Z) -- 69.50
-- Hypothenus is 93, I didnt need it in the ATan formula.
print(math.deg(math.atan2(ZDiff, XDiff)) -- Output: 48

Here is a visual representation I did based off what I think is happening behind the scenes: did I visualize it correctly?

I only think that solution would work in the first quadrant. The cool thing about atan2 is that it works in all 4 quadrants, but uses two numbers vs normal atan's single number. However it needs to know the signs of the input numbers (+/-), so taking the absolute value of the position difference removes important information that it needs.

Try it all around the circle, IMO it should only work without the abs. Other than that yeah it looks right, I think you even have the order of parameters to atan2 right which can be a bit confusing.

Yeah, it definitely looks like 48 should be right. Can you try negating the 1st parameter to atan2? I.e. math.atan2(-ZDiff, XDiff). I think it’s the opposite of a normal coordinate system because Roblox’s front vector is (0, 0, -1) and not (0, 0, 1). You can see the XYZ axes in Studio using the View Selector (it’s really hard to see in this screenshot).

I tried negating the 1st parameter, it didnt work, then I tried the negatiting the X(Second Paramater) and it worked. The angle now displays properly,Thank you for assisiting.