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An unfortunate reality in our world is that homicides happen. In order to bring justice for the victims crime scenes have to be carefully dissected to bring about evidence to find and convict a criminal. One way this happens is through a careful analysis of the blood spatter. The shape of a blood spatter tells a great deal about the angle in which it hit the ground. This can enlighten investigators when they are trying to determine the height or distance that the crime took place.
In geometry or precalculus class, this can be investigating with advanced trigonometry with this 21st Century Math Projects.
In this 14 page document you will be given a mapping to the Content Standards, an outline for how to implement the project, and handout resources for students to use.
-- In “Blood Spatter Analysis”, students are guided through developing a strategy using trigonometry to calculate the angle of impact of a blood spatter. They are asked follow up questions, about the height of the killer however the killer could be crouching, on a piece of furniture, etc. that could affect the investigation.
-- In “Area of Convergence” students will be guided through a geometric look at area of convergence. However this activity doesn’t lend itself so well on paper so I’ve provided tables with data. Ideally, you’ll be recreating crime scenes so they can get the full effect! ☺
-- In “Crime Scene Investigation” you will create crime scenes for students to calculate and interpret. You can be as creative with this as you’d like. Blood spatters are provided, but you may prefer to make your own. I’ve made them a little larger than real life just to make measuring a little easier. In the resource students are asked to sketch the crime scene and calculate it and interpret it. I’ve included an extra sheet that you can duplicate for as many crime scenes as you would like them to solve!
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