重覆點擊 ▶▶ 鈕，看看如何構作以下圖形。[br]根據老師指示，構作這個圖形。[br]Click the button ▶▶ repeatedly to see how the following figure is constructed.[br]Construct this figure according to the teacher's instruction.
使用代數指令構作以下繡曲線圖形。Construct the following figures with algebraic commands.