Geo ScreenCast 12: Arc Length

[jnctf]

loud background music and I cant barely hear you.

[520nacy]

are u a teacher???

[mung0jerry]

The method that I learned when I was in school for arc length:

s = rθ

...where s = arc length, r = radius of the circle, and θ = central angle in radians. In your example:

s = 6 cm ∙ 150°

s = 6 cm ∙ (150° ∙ (π / 180 rad)) [convert to radians]

s = 6 cm ∙ 5π/6 rad = 30π/6 = 5π cm = 15.708 cm.

Both work, of course, but just mentioning another way to do it ;).

[afxtwn]

*loud

[afxtwn]

your background music is WAY to lound