Arc Length
Presentation
•
Mathematics
•
9th - 12th Grade
•
Hard
James Gonzalez
FREE Resource
4 Slides • 4 Questions
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7.4 Arc Length
Goal: I can find the arc length, radius/diameter, or central angle of a circle.
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Arc Length
Arc Length is the length of a portion of the circumference.
To find this we multiply the circumference by the fraction of the circle the arc subtends.
The fraction of the circle is determined by dividing the central angle by 360.
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Example 1: Find length of minor arc AB.
Arc Length =
r = 12; central angle = 45
Arc Length =
Arc Length = or 9.42
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Multiple Choice
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Multiple Choice
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Fill in the Blanks
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Fill in the Blanks
Alison is jogging on a circular track that has a radius of 140 feet. She runs along the track from point R to point N, a distance of 230 feet. Find, to the nearest degree, the measure of minor arc RN.
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7.4 Arc Length
Goal: I can find the arc length, radius/diameter, or central angle of a circle.
Show answer
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