一题多解是解题教学活动中最能刺激学生思维兴趣的教学活动选用典型的例题，通过多角度分析，培养学生灵活运用知识的能力，从而激发学生的探索兴趣和创造精神，强化思维训练．问题：直角三角形的斜边长为c，另两边长为a、b，求证：并问等号什么时候成立1直觉思考这是一道几何 A multi-solution is a typical example of a teaching activity that can stimulate students’ interest in thinking in the problem-solving teaching activities. Through multi-angle analysis, students can develop their abilities to use knowledge flexibly, thereby stimulating students’ interest in exploration and creativity, and intensifying thinking training. . Question: The hypotenuse of a right-angled triangle has a length of c, and the other two sides are a and b. Proof: and ask when the equal sign is established. 1. Intuitive thinking. This is a geometry.