我们知道,一个三角形有三个内角,三条边,三条高,三条中线和三条角平分钱.如果这些角,边以及线段之比是3:4:5,那么这些三角形有怎样的结果呢?对应的边、线段之比又是怎样的比呢?请看下面的例说. 一、角度、边长之比是3:4:5的三角形 例1 三个内角之比是3:4:5的三角形的三个内角分别是45°、60°、75°。 例2 三边之比是3:4:5的三角形是 We know that a triangle has three internal angles, three edges, three heights, three middle lines, and three corners that divide the money. If the ratio of these angles, edges, and line segments is 3:4:5, what are the results of these triangles? What is the ratio of the edge to the line segment? Look at the following example. A triangle with a 3:4:5 ratio of angles and side lengths. Example 1 A triangle with a 3:4:5 ratio of the three interior angles. The three interior angles are 45°, 60°, and 75°, respectively. Example 2 The triangle whose ratio of three sides is 3:4:5 is