锐角三角形有如下两条不起眼的性质,解题时一不小心就会出错.为了引起同学们的关注,特将它的两条性质整理出来,并配上应用,供同学们学习时参考.性质1在锐角三角形中,每一个内角都是锐角且任意两内角之和大于直角;性质2在锐角三角形中,每一条边都夹在它的邻边和它们的夹角的余弦的积和商之间且任意两边的平方之和大于第三边的平方. Sharp triangle has the following two humble nature of the problem-solving accidentally mistakes.In order to arouse the concern of students, especially its two properties sorted out, together with the application for students to learn reference. Property 1 In an acute triangle, each interior angle is an acute angle and the sum of any two interior angles is greater than a right angle. Property 2 In the acute triangle, the sum of the product of the product of the cosine of each side at its neighbors and their included angles And the sum of the squares of any two sides is greater than the square of the third side.