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  • Indirect measurement, by Christian Sundstrom and Ryand Sherwood.
  • What is indirect measurement?
  • Indirect measurement is a a method of using proportions to solve for the length of objects.
  • Where can it be used?
  • it can be used anywhere, even here to find the length of this sign. We can use my height, my shadows height, and the object and it's shadow. We can use objects we know the height of to find the height of objects we don't know. 
  • Indirect measurement apply's to shadows because we can use an object's shadow to find it's height. for example, this street pole is too big to measure, so we would have to use Indirect measurement. to find it's height.
  • How does it apply to shadows?
  • Why can we use the triangles we draw to solve for unknown measurement?
  • We can use the triangles that we draw because if there are two that are similar with the same measurements because you can set-up a proportion and solve for the variable.
  • Can I have an example?
  • Yes. A lamp post is x feet tall. A man that is 5 ft tall is standing next to it. The mans shadow is one foot tall. The post's is two feet tall. How tall is the lamp post.
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