Angle Degrees
Storyboard Popis
Angle Degrees
Storyboard Text
- Skluzavka: 1
- 6
- la
- 98
- I hear degrees all the time. What are degrees when we are talking about angles?
- Degrees are a unit of measurement, like inches or pounds.
- Skluzavka: 2
- Degrees measure rotation or turn of an angle in reference to a full circle.
- Skluzavka: 3
- EXAMPLE
- A sailor looks straight ahead through a spyglass at another ship. There is no turn, so he is looking at an angle of 0 degrees.
- Skluzavka: 4
- o
- 45
- EXAMPLE
- Then he gets distracted by a bird and looks up. His head has turned upwards. Now he is looking at an angle of 45 degrees.
- Skluzavka: 5
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- 1
- In a full circle, there are 360 degrees. Each degree is 1/360 of a full circle.
- Skluzavka: 6
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- Some think that 360 was chosen for the number of degrees in a circle because it is close to the number of days in a year.
- Skluzavka: 7
- The factors of 360 are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, and 360
- 360 also has many factors, so a circle can be divided into equal parts easily.
- Skluzavka: 8
- o
- o
- o
- 180
- 120
- 90
- o
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- 60
- 72
- 45
- Each circle has been divided into equal parts. The angle measurement of each part is outside each circle.
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