For the consumption-conscious, estimating the serving size of a piece of pizza, pie or cake can be challenging given their odd wedge-shape. Triangular food portions can now be accurately measured using a new adjustable wedge tool, according to a new study. It is important to watch portion sizes of foods such as these, as they can be higher calorie and lead to weight gain in excess -- which can become a risk factor for heart disease.

Tennessee State University researchers created an adjustable wedge to help determine the adequate serving size of triangular foods. They then tested this tool on subjects using pizza, cake and pie. When compared to the use of a ruler, the wedge was more popular by majority for its accuracy and ease of use. Unsurprisingly, the study found that participants frequently misjudged portion sizes -- underestimating the size of pieces of pie and pizza, and overestimating the size of a piece of cake.