## babydoll332 Group Title Use the arc length formula and the given information to find r. s = 12 cm, θ = 36°; r = ? one year ago one year ago

1. babydoll332 Group Title

2. dpaInc Group Title

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.

3. babydoll332 Group Title

check

4. dpaInc Group Title

???

5. babydoll332 Group Title

i did this

6. dpaInc Group Title

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

7. dpaInc Group Title

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

8. babydoll332 Group Title

oh i see thank you so much