QUESTION IMAGE
Question
find the area of the shaded triangle.
8 m
5 m
enter the correct answer in the box.
□ m²
Step1: 确定三角形底和高
观察图形,阴影三角形的底为长方形长的$\frac{1}{2}$,即$\frac{8}{2}=4\ \text{m}$,高等于长方形的宽$5\ \text{m}$。
Step2: 代入三角形面积公式
三角形面积公式为$S=\frac{1}{2} \times 底 \times 高$,代入数值:
$S=\frac{1}{2} \times 4 \times 5$
Step3: 计算面积
先算$4 \times 5=20$,再算$\frac{1}{2} \times 20=10$
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