在教室和户外发现这些图形之后，儿童可以用彩色胶带勾勒出这些三角形，例如，他们可以用红色胶带做直角三角形，用蓝色胶带做不等边三角形。
After finding them in the classroom or outdoors, children can outline the triangles with colored tape. For example, they might make right triangles red and scalene triangles blue.
给儿童介绍不同种类的三角形，如等边三角形、等腰三角形、不等边三角形和直角三角形。
Introduce children to different kinds of triangles, such as equilateral, isosceles, scalene, and right.
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