正六边形由6个正三角形组成。设每个正三角形面积为A。如图。加三个正三角形扩张成为一个大正三角形,其面积为9A。
9A = 3*5 + 3*8 + 3*(2A - 7), A=6, ? = 2A - 7 = 5.
正六边形由6个正三角形组成。设每个正三角形面积为A。如图。加三个正三角形扩张成为一个大正三角形,其面积为9A。
9A = 3*5 + 3*8 + 3*(2A - 7), A=6, ? = 2A - 7 = 5.
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy