**Field
Investigation**

**This part of the
investigation requires a field trip to several department stores for on-site
measurements. The measurements that the
students obtain may be somewhat imprecise because of the crude equipment that
is recommended. A builder’s contour tool
is suggested to contour the shape of the angles between the mirrors. The shape can then be traced on a sheet of
paper and measured with a protractor.
Students should be required to obtain the following for each of the
mirrors observed.**

**1.
****approximate measures of
the angles **

**2.
****a description of how
well the particular angle setting enables views of the front, sides and back**

**When the students return
to their classroom, they should compare findings with their previous
assumptions and use of this information to come up with a recommendation for
the optimal angle settings.**