mayadavis202
contestada

A circle has a radius of 12.6 cm.

What is the exact length of an arc formed by a central angle measuring 120°?



Enter your answer in the box. Express your answer using π .

Respuesta :

calculista
we know that

[the length of a circumference]=2*pi*r
for r=12.6 cm
[the length of a circumference]=2*pi*(12.6)---------> 25.2*pi cm
this is the length for an arc of 360°  (full circumference)

now calculate the length for an arc of 120° (applying a rule of three)  
if 360°-----------------> 25.2*pi cm
 120°---------------> X
X=120*25.2*pi/360----------> 8.4*pi

the answer is 8.4*pi

annieeeee1029384756

Answer:

8.4 cm is the answer

Step-by-step explanation:

k12 verified (I took the test)