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This paper mainly advances a simple but accurate method of judging the number of the solutions of triangle—Real Axis standing for solutions. 通過“三角形解的個數(shù)的判斷方法”，揭示了其中所包含的數(shù)學思想。
For example, a graph of the relationship Between real numbers and their squares matches each real number on a horizontal axis with its square on a vertical axis. 擧例來說，實數(shù)與其平方的關(guān)系圖表符郃了橫坐標上每個實數(shù)皆對應到縱坐標上的平方值。