Question

Use the arc length formula and the given information to find r.
s = 12 cm, θ = 36°; r = ?

Answer 1

30/pi
or 60/pi im not sure please help wich 1 i think its deff 30/pi

Answer 2

the formula is s = r*theta, where theta is given in RADIANS.
so you should first convert that degree measure into radians then you can use the formula.

Answer 3

check

Answer 4

???

Answer 5

i did this

Answer 6

\(\large \theta = 36 \cancel {deg} \cdot \frac{\pi rad}{180 \cancel {deg}}=\frac{ \pi }{5} \text radians \)

Answer 7

so now,
\(\large 12=\frac{\pi}{5}\cdot r \rightarrow r=\frac{60}{\pi}\)

Answer 8

oh i see thank you so much