“…… Ye Fan, this polygon verification involves a series of proportional numbers, you need to list the quadratic inequalities, and then draw auxiliary lines to cut into two triangles, and calculate the radius in the inscribed circle of each triangle......"

“…… And this increase or decrease letter......

Chapter 80 of "Dragon Gate" Ye Fan, are you interested in worshipping me as a teacher? I am hitting it in my hand, please wait a moment,

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