Book

topuztilbe, Nov 7, 2017

Table of Contents

  1. angle proportional to arc
    1. Angle at Center
    2. Angle at Center with spreadsheets
    3. Arc and Angle
    4. eyeball model
    5. Spotlight
    6. compare angles and arcs
    7. two arcs
    8. sliding secant lines
  2. angles at circumference
    1. Angle at circumference
    2. angle at center and circumference
    3. Equal angles in circle; various theorems
    4. Analog Clock

1.

angle proportional to arc

  • 1. Angle at Center
  • 2. Angle at Center with spreadsheets
  • 3. Arc and Angle
  • 4. eyeball model
  • 5. Spotlight
  • 6. compare angles and arcs
  • 7. two arcs
  • 8. sliding secant lines

1.1.

Angle at Center

Change the angle at center and the subtending arc.
Angle at Center
– Arthur Lee

1.2.

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1.3.

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1.4.

–

1.5.

–

1.6.

–

1.7.

–

1.8.

–

2.

angles at circumference

  • 1. Angle at circumference
  • 2. angle at center and circumference
  • 3. Equal angles in circle; various theorems
  • 4. Analog Clock

2.1.

Angle at circumference

Compare the marked angles. When is one greater / smaller than the other?
Angle at circumference
– Arthur Lee

2.2.

–

2.3.

–

2.4.

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