Respuesta :

hillqryc

Answer:

3π, 6π

Step-by-step explanation:

12π*1/4=3π

16π*135/360=6π

indrawboy

the length of arc:

[tex]\tt =\dfrac{\alpha }{360}\times 2\pi.r[/tex]

5.

[tex]\tt \dfrac{90}{360}\times 2\pi6= 3\pi~yd[/tex]

7.

[tex]\tt \dfrac{135}{360}\times 2\pi.8=6\pi~km[/tex]

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good job