Plz i’ve been trying to figure this out since 3: 20 and no progress has been made

1. 40. Add up all the known angles, and subtract then from 360, since all the angles to get her make a circle. This will give you the unknown value. 160+75+45=280. 360-280=40

2. 140 Repeat. 125+73+22=220. 360-220=140

3. 107 Repeat. 226+27=253. 360-253=107

4. 163 Repeat. 120+36+41=197. 360-197=163

Hope this helps!

or

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.