怎样平分一个角?除了用量角器,还有其它办法吗?下面介绍几个在日常生活中能见到也能想到的平分角的仪器:如图1,仪器ABCD可以用来平分一个角,其中AB=AD,BC=DC,将仪器上的点A与∠PRQ的顶点R重合,调整AB和AD,使它们落在角的两边上.沿AC画一条射线AE,AE就是∠PRQ的平分线.(用三角形 How do you evenly divide an angle? In addition to the protractor, what else can you do? Here are a few examples of the bisecting angles that you can see in everyday life: Figure 1. The instrument ABCD can be used to even out an angle, where AB =AD, BC=DC, coincide the point A on the instrument with the vertex R of ∠PRQ, adjust AB and AD so that they fall on the two sides of the angle. Draw a line AE along AC, AE is the bisector of ∠PRQ. (with a triangle