Copying Row Into Worksheet After Populating Cells

I have the following simplified example:
Table with three columns with a growing number of rows. The user enters data into each row, once user enters the last value and hits "Enter" on the final cell (column c) I want a script to evaluate the row and copy the entire contents of the row onto an existing different worksheet. The first column (A) contains the attribute that will be the condition that determines which sheet to paste in

For example, in my attached file, the first row contains the value "Square".
I want that row be copied and pasted into the 2nd tab of the worksheet (reserved for "Square" data) on the next free line. Simiarly, Triangles should be pasted on the thrid tab. Note however that i think the data should be copied line-by-line as the user enters it, which obviously isnt the case for the example dummy data, its just there to simulate my setup