Density and triangles are directly related in a few interesting ways. Learn a density triangle trick with help from an experienced math tutor in this free video clip.

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Density and triangles are directly related in a few interesting ways. Learn a density triangle trick with help from an experienced math tutor in this free video clip.

Part of the Video Series: High School Math

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Hi there. This is Ryan Malloy here at the Worldwide Center of Mathematics. In this video, we're going to discuss the density triangle trick. The density triangle trick is a way to help you remember the relationship between density, mass and volume. So we'll take a triangle, we're going to divide it into three parts, one on top and two on the bottom, we'll label this one D for density. We'll call this top part M for mass and this bottom right part V for volume. Now we can use the density triangle trick to write each of these three quantities as a function of the other two D equals what, M equals what and V equals what. Now to find each formula you simply cover up whichever piece you're looking for. Density as a function of mass and volume, simply cover the D in this triangle, we get M over V, simple enough, M over V. If we want to know mass, we simply multiply density times volume, D times V. And finally if we want to know volumes we cover that up and we see we have M over D and that's all there is to it. My name is Ryan Malloy and this was the density triangle trick.