•
Arc length=Pointsto Consider
Afterperimeterand circumference,the next logicalmeasureto studyis area.In this lesson,we learned
aboutthe perimeterof a circle(circumference)and the arc lengthof a sector. In the next lessonwe’ll learn
aboutthe areasof circlesand sectors.
LessonExercises
- Prove:The circumferenceof a circlewith radius is
- The Olympicssymbolis five congruentcirclesarrangedas shownbelow. Assumethe top threecircles
are tangentto eachother.
Bradis tracingthe entiresymbolfor a poster. How far will his pen pointtravel?
- A truckhas tires that measure inchesfrom the centerof the wheelto the outeredgeof the tire.
a. How far forwarddoesthe trucktraveleverytime a tire turnsexactlyonce?b. How manytimeswill the tire turn whenthe trucktravels mile? mile feet).- The followingwire sculpturewas madefrom two perpendicular cm segmentsthat intersecteachother
at the centerof a circle.