Answer
The radius of curvature is $4762~ft$
Work Step by Step
We can convert the angle from degrees to radians:
$1.2^{\circ} \times \frac{\pi~rad}{180^{\circ}} = 0.021~rad$
We can assume that the length of the arc is approximately equal to the length of the chord. We can find the radius of curvature:
$\theta~r = d$
$r = \frac{d}{\theta}$
$r = \frac{100~ft}{0.021~rad}$
$r = 4762~ft$
The radius of curvature is $4762~ft$
