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Intermediate

Similar but different

Four similar triangles make up a large triangle. Express red in terms of green and yellow.

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Solution

Red=2√(green*yellow).

Solution by yifs.

AB:BC=CD:DE
BC×CD=AB×BE
red^2 =(2×green)×(2×yellow) =2^2×green×yellow red=2√(green×yellow)

Video

Please find here the video solution: Video: Similar but different.

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