2.Next I'll draw a line from P down to B, and then from P down to C, and I claim that this triangle here is congruent to its reflection across that perpendicular bisector, which will be CPD.
接来,我将从 P 向到 B,然后从 P 向到 C 的线, 我声称这里的这个三角形与其在垂直平分线上的反射全,这就是 CPD。机翻