用尺子在纸上画两条对角线，把正方形分成四个三角形。

Use a ruler to draw two ___diagonals on the paper, dividing the square into four triangles.

他用对角线将棋盘分成四个相等的部分。

He divided the chessboard into four equal parts using ___diagonals.

国际象棋中，象沿棋盘对角线移动。

In chess, the bishop moves along the ___diagonals.