The chord length is 4.85M, the chord height is 0.7m, what is the arc length and how to calculate it?

The chord length is 4.85M, the chord height is 0.7m, what is the arc length and how to calculate it?

I remember to work out the angle
Let R be the radius
r^2=(4.85/2)^2+(r-0/7)^2
According to the cosine value, get the angle, then * 2 is the angle corresponding to the arc, then / 360, and then * the circumference of the circle is the arc length

Given chord length 8, arch height 1.8, calculate arc length
Such as the title

Given chord length L = 8, arch height h = 1.8, find arc length C? Arc radius r, the center angle of arc is A.R ^ 2 = (R-H) ^ 2 + (L / 2) ^ 2R ^ 2 = R ^ 2-2 * r * H + H ^ 2 + L ^ 2 / 4 2 * r * H = H ^ 2 + L ^ 2 / 4, r = H / 2 + L ^ 2 / (8 * h) = 1.8 / 2 + 8 ^ 2 / (8 * 1.8) = 5.344m, a = 2 * arc sin ((L / 2) / R) = 2 * arc sin ((8 / 2) / 5.344) =

Arc calculation: chord length 17m, 5m, find arc length?

First, we use Pythagorean to get the radius of the circle: 1.5 square plus 8.5 square in the root sign, which is equal to 74.5 square in the root sign
(8.5 = 17 divided by 2)
l=r
Arc length = 74.5 in π x1.5x radical