i don't know how to type the answer out but it's on the work i just did ⬆️
<span>$60.00 - $42.00 = </span><span>$18
</span><span>$18 / $60 = 0.30 = 30%
Answer
Decrease 30%</span>
Angle 6 - 30
Angle 5 - 73
Angle 1 - 37
Angle 2 - 52
Angle 4 - 63
Angle 3 - 128
<span>You did not include the equations that you want to assess whether they can be used to solve for the radius (r).
Likely, the equation of the circumference, C = 2*Pi*r is included, if so => r = C / (2*Pi).
If you round Pi to 3.14, the equation may be written r = C / 6.28.</span>