巧用几何模型解决三角问题

摘要

将三角恒等变换或三角计算问题与几何模型联系起来，是数形结合的重要形式．利用适当的几何图形，可以帮助我们揭示三角问题的规律，使我们更深刻地理解三角问题的本质．恰当的几何模型既有方法的价值，又有揭示问题中数学本质的意义．%Association of geometric model with triangular constant transformation and triangular calculation is an important form of math-geometry integration. The use of appropriate geometric entities helps reveal the regular patterns and fundamental nature of triangular problems. Appropriate geometric models are of both methodological value and utility of revealing the nature of mathematical problems.