**HW: pg456 #19-39 odds (lesson 9-2)- read the instructions! Show the work when finding the LENGTH of each arc.**

**Today: lesson 9-2 more in depth. We worked on finding the measure of an arc and the LENGTH of an arc. Two separate types of measurement.**

**Measure of an arc is equivalent to the measure of its central angle.**

**The length of an arc is a fraction of its CIRCUMFERENCE.**

**Length of an arc = (x/360) *(C) = (x/360)*(pi*d)**

*where x = measure the arc's central angle.*
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