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Illustrative Math
Grade 8
Let’s use shadows to find the heights of an object.
Illustrative Math Unit 8.2, Lesson 13 (printable worksheets)
What do you notice? What do you wonder?
Here are some measurements that were taken when the photo was taken. It was impossible to directly measure the height of the lamppost, so that cell is blank.
Explain why the relationship between the height of these objects and the length of their shadows is approximately proportional.
The Open Up Resources math curriculum is free to download from the Open Up Resources website and is also available from Illustrative Mathematics.
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