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读初三时,教几何的陈老师有一手绝活,总是让我们惊叹不已。因为要配合讲解,每节课上,他都要在黑板上“画”一些直线、三角形和圆形,可陈老师从不像别的几何老师那样,需要用尺子、圆规等教具。每当作图的时候,只见他马步一蹲,提起粉笔,运笔如飞,三下两下,一个复杂的几何图形便呈现在黑板上了,而且绝无涂改。有同学下课后用圆规按住圆心比划陈老师画出的圆,竟一模一样!每当陈老师“作画”的时候,我们全都屏住了呼吸,每个人的目光都锁定在陈老师移动的手指上,仿佛那是魔术师的手指。我们曾在纸上无数次地模仿陈老师画
Chen read the first three days, teaching geometry Chen has a unique skill, always let us wonder. Because we should cooperate with the explanation, in each class, he has to draw some straight lines, triangles and circles on the blackboard. However, unlike other geometry teachers, Chen does not need to use rulers, compasses and other teaching aids. Whenever drawing, I saw him riding a squat, raised chalk, flying pen, twice or twice, a complex geometry will be presented on the blackboard, but no change. A classmate after class with a compass hold the center of the circle drawn by Professor Chen, exactly the same! Whenever Professor Chen “painting”, we all hold his breath, everyone’s eyes are locked in the movement of Mr. Chen Finger, as if that is the magician’s finger. We have imitated Professor Chen many times on paper