The design of a microchip has the scale 40:1. The length of the design is 18cm, find the actual length of the micro chip?​

0.45 cm

Step-by-step explanation:

Actual length of the micro chip

idk

step-by-step explanation:

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.