QUESTION IMAGE
Question
find the area of the regular hexagon.
12 in.
10.4 in.
enter the correct answer in the box.
in²
Step1: 确定正六边形面积公式
正六边形可看作6个全等的等腰三角形,也可使用公式:$面积=\frac{1}{2}×周长×边心距$
Step2: 计算正六边形周长
正六边形边长为12英寸,周长$C=6×12=72$英寸
Step3: 代入公式计算面积
已知边心距为10.4英寸,代入公式:
$面积=\frac{1}{2}×72×10.4$
先计算$\frac{1}{2}×72=36$,再计算$36×10.4=374.4$
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374.4