解答此题---**Text Extraction:** 27. 费马是 17 世纪的法国数学家，他曾研究过一种特殊的点，它满足“在一个三角形所在平 面上，到该三角形的三个顶点的距离之和最短”，这样的点被称为“该三角形的费马点”。 (1) 如图，在 △ABC 中，∠A=90°，AB=AC，点 D 在线段 BC 上且线段 BD＞DC， 请判断：点 D 是否为 △ABC 的费马点，并说明理由。 第 27 题 (1) **Chart Description:** * **Type:** Geometric figure (Triangle). * **Main Elements:** * **Shape:** A triangle labeled ABC. * **Points:** Points A, B, and C are vertices of the triangle. Point D is a point on the line segment BC, located closer to C than B. * **Lines:** Three straight lines forming the sides of the triangle: AB, AC, and BC. Point D is on line segment BC. * **Labels:** Vertices are labeled A (at the top), B (at the bottom left), and C (at the bottom right). Point D is marked on the line segment BC with a black dot and labeled D. * **Relative Position:** A is above BC. B is to the left of C on the horizontal line segment BC. D is between B and C on BC, located to the right of the midpoint of BC. * **Annotation:** Below the figure is the label "第 27 题 (1)".