Worksheet Triangle Sum AndExterior Angle theorem. A worksheet, in the term’s original meaning, can be a sheet of paper on which one performs work. It is a printed page a child finishes using a writing instrument. No other materials are needed. It is”a sheet of paper where work schedules, working time, special instructions, etc. are recorded. A piece or scrap of paper on which problems, ideas, or so on, are set down in tentative form.” In schooling, a worksheet may have questions for students and places to record responses. In accounting, a worksheet is, or has been, a sheet of ruled paper with rows and columns where an accountant could record data or perform calculations.