Known arc length 785, diameter 750, angle 60 degrees, find chord length Half TCA 750cm

Known arc length 785, diameter 750, angle 60 degrees, find chord length Half TCA 750cm

Let l be the chord length, R be the radius, and 0 be the angle
(L / 2) / r = sin (Θ / 2), that is, the chord length is L = 2R * sin (Θ / 2) = 750 * sin, 30 degrees = 375

Knowing the arc length and diameter of a circle, how to find the chord length?

As shown in the figure:

Given the chord length of 12.5m, 9m, find the arc length

Given the chord length L = 12.5m and the bow height h = 2.9m, the arc length C? The radius of the arc is r, and the center angle of the arc is A.R ^ 2 = (R-H) ^ 2 + (L / 2) ^ 2R ^ 2 = R ^ 2-2 * r * H + H ^ 2 + L ^ 2 / 42 * r * H = H ^ 2 + L ^ 2 / 4R = H / 2 + L ^ 2 / (8 * h) = 2.9 / 2 + 12.5 ^ 2 / (8 * 2.9) = 8.185ma = 2 * arc sin ((L / 2) / R) = 2 * arc sin ((12...)