Geometry, Teacher\'s Edition

(Axel Boer) #1

5.9 Circles


About Circles


I.SectionObjectives



  • Distinguish between radius, diameter, chord, tangent, and secant of a circle.

  • Find relationships between congruent and similar circles.

  • Examine inscribed and circumscribed polygons.

  • Write the equation of a circle.


II.ProblemSolvingActivity-CircleRhymes



  • Create a rhyme about circles.

  • Students can make it a rap, a song or a poem.

  • Here are the components of the rhyme.

  • Each must have:

  • Radius

  • Diameter

  • Chord

  • Tangent

  • Secant

  • Defined in it.

  • Students can choose to include other elements, but these key ones must be in there.

  • In addition, if students want to mention pi, they can, just be sure that they have the other parts of a circle
    involved.

  • Allow students time to work on this poem.

  • Students can perform/present it in small groups.

  • If you have a really creative group that likes to perform, you might have them do it for the whole class. If this
    is the case, then presentations may take a whole class period.


III.MeetingObjectives



  • Students will distinguish between radius, diameter, chord, tangent, and secant of a circle.

  • Students will present their material in a creative fun way.


IV.NotesonAssessment



  • Be sure that all of the important components are present.

  • Students really can’t do this wrong.

  • Sit back and enjoy watching students use their creativity to bring circles to life.


Tangent Lines


I.SectionObjectives


Chapter 5. Geometry TE - Problem Solving
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