QUESTION IMAGE
Question
in the figure shown, which composition of rigid transformations will map one triangle onto the other? a. a glide reflection b. a reflection followed by a translation c. two translations d. a rotation followed by a translation
Brief Explanations
- 观察两个三角形的对应边和角的位置关系:两个三角形是镜像对称的,首先通过反射(镜像)可以让对应边和角的方向对齐,之后再通过平移可以将其中一个三角形移动到另一个的位置。
- 分析其他选项:A选项滑动反射是反射加沿反射轴的平移,这里不需要沿轴平移;C选项两次平移无法改变图形的朝向,不能让镜像图形重合;D选项旋转加平移也无法将镜像的三角形重合。
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B. a reflection followed by a translation