The perimeter of a circle is given by:
P = 2 * π * r where r is the raduis.
Therefore the length of a semicircle is π * r
The radius is therefore
r = 10.28mm / π = 3.272mm
Answer:Reaction time tests can be used to assess an individual's hand-eye coordination. One test involves catching a 1 metre ruler and measuring the distance, d in metres, that the ruler travelled before being caught. The reaction time t seconds is then calculated using the formula: = √2d/9.8.
Step-by-step explanation:
Circle has no edges and any shape with angles have edges