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What is the length of GI

What is the length of GI-example-1
User AvatarKava
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Check the picture below.

so the triangles are similar by AA.


\cfrac{GI}{10}~~ = ~~\cfrac{15}{12}\implies \cfrac{GI}{10}~~ = ~~\cfrac{5}{4}\implies 4GI=50\implies GI=\cfrac{50}{4}\implies GI=12.5

What is the length of GI-example-1
User Arthur Hjorth
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