Day 1

1. SectionSection
4.14.1

2. Label these parts!Label these parts!

3. Definition of a radian:Definition of a radian:

4. Conversions:Conversions:
 Degree – most common unit usedDegree – most common unit used
 Minutes – 1’ – 1/60 of a degree = deg/60Minutes – 1’ – 1/60 of a degree = deg/60
 Seconds – 1” – 1/60 of a min = deg/3600Seconds – 1” – 1/60 of a min = deg/3600

5. Convert to DMSConvert to DMS
 37.42537.425
 15.73515.735

6. Convert to decimalConvert to decimal
 3939º5’34”º5’34”
 42º24’36”42º24’36”

7. Degree / RadianDegree / Radian
ConversionConversion

8. Convert:Convert:
 9090º to radiansº to radians
 45º to radians45º to radians
 to degreeto degree
 to degreeto degree
2
3π
3
π

9. Arc Length FormulaArc Length Formula
 For radians:For radians:
 For degrees:For degrees:
Θ= rS
180
Θ
=
r
S
π

10. Example:Example:

11. Example:Example:
 Find the perimeter of a 60Find the perimeter of a 60º slice of pizzaº slice of pizza
with a 7 inch radius.with a 7 inch radius.

12. HomeworkHomework
 p. 358 (1-31 odd, 35-38, 59-62)p. 358 (1-31 odd, 35-38, 59-62)