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北师大版教材八年级上册第13页,是第一章勾股定理的第三小节,课题为“蚂蚁怎样走最近”。其中,提到这样一个问题:题1:如图1所示,有一个圆柱,它的高等于12厘米,底面半
The third grade of the first chapter of the Pythagorean theorem is on page 13 of the eighth grade book of the Beijing Normal University Edition textbook. The topic is “How the Ants Go Nearest”. Among them, mentioning such a problem: Question 1: As shown in Figure 1, there is a cylinder whose height is higher than 12 cm and the bottom surface is half