Proof Without Words H

作者：nicholas_bugayong, Steve Phelps

Look for the right triangles and squares. Drag the points and slider in the sketch below. What do you notice? What does this prove? How does this prove it?

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Dan Zhang (ch1 test)
Rover
Exploring The Vertex and Shape of Quadratic Graphs
G_2.02 Proving lines parallel

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直角三角形
圓錐曲線
曲線描繪
立方（體）
平行四邊形

Proof Without Words H

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