A square with a circle and a tangent. The tangency point lies on the diagonal. What fraction is red?
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Solution
The red fraction is (7-3√5)π/2, which is approximately 45,8%.

A square with a circle and a tangent. The tangency point lies on the diagonal. What fraction is red?
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The red fraction is (7-3√5)π/2, which is approximately 45,8%.
A square with a circle and a tangent. The tangency point lies on the diagonal. What fraction is red? https://t.co/2JkCsNPlkv pic.twitter.com/N0xaxUQk8O
— Mirangu (@Mirangu1) March 29, 2023