“嘉惠后学”的数学教育家华蘅芳在天津武备学堂,编写了深入浅出的数学讲义《三角测量说》,这是中国近代数学教育的佳作.这部分内容在现代是高、初中数学教育必然涉及到的,作为数学家和教育家的华蘅芳所编写的讲义,是不可多得的科普读物.它既高瞻远瞩又深入浅出,不仅对于当前我国教材的编写有一定的借鉴作用,而且对一线教师教案的编写及教法的选择也有一定的指导作用.《三角测量说》全文分为五部分:第一部分简要论述了测量的基础知识.第二部分介绍了平面三角形 Hua Yifang, a mathematics educator of Jiahui Houxue, wrote a mathematics handout “Triangle Measurement Theory” in Tianjin Wubei Academy. This is a masterpiece of modern Chinese mathematics education. This part is a high school and a junior high school in modern times. Mathematical education is bound to involve, as a mathematician and educator Hua Fangfang prepared lectures, is a rare popular science books. It is far-sighted and simple in layman’s language, not only for the current preparation of teaching materials in our country has a certain reference function, but also It also has a certain guiding role in the preparation of teachers’ teaching plans and the choice of teaching methods. The article “Triangle Measurements” is divided into five parts: The first part briefly discusses the basics of measurement. The second part introduces plane triangles.