Find the length of an arc of a circle with radius 18 cm if the arc subtends a central angle of 30°.

The length of an arc of a circle with radius 18cm is; L = 9.426cm

The length of an arc can be evaluated using the formula;

Hence, the length of the given arc is;

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9.42 cm.

Step-by-step explanation:

Length of arc is given by :-

, where r= radius and x= central angle subtended by arc.

As per given , we have

Then, the length of arc will be :

Hence, the length of arc is 9.42 cm.

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.