How to equally divide a circle

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Presentation transcript:

How to equally divide a circle by Zoe Williams 2015

Divide a circle into three parts Draw a circle with a compass.

Divide a circle into three parts Draw a circle with a compass. Mark the center and top.

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle?

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360°

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360° How many slices do you want?

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360° How many slices do you need? 3

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360° How many slices do you need? 3 Divide 360° by 3.

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360° How many slices do you need? 3 Divide 360° by 3. 120°

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360° How many slices do you need? 3 Divide 360° by 3. 120° With a protractor, line up the center dot at the center of the half circle and the top dot at zero.

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360° How many slices do you need? 3 Divide 360° by 3. 120° With a protractor, line up the center dot at the center of the half circle and the top dot at zero. Mark 120° from a dot on the circle.

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360° How many slices do you need? 3 Divide 360° by 3. 120° With a protractor, line up the center dot at the center of the half circle and the top dot at zero. Mark 120° from a dot on the circle. Repeat for every corner.

Divide a circle into three parts Draw a circle with a compass. Mark the center and top. How many degrees are in a circle? 360° How many slices do you need?360° by 3. 120° With a protractor, line up the middle dot and the top dot. With a protractor, line up the center dot at the center of the half circle and the top dot at zero. Repeat for the third corner. Connect the three dots on the circle to the center dot.

Divide a circle into six parts How do I start?

Divide a circle into any number of parts Can you divide a circle into six parts?

Divide a circle into any number of parts Can you divide a circle into four parts?

Divide a circle into any number of parts Five parts?

Divide a circle into any number of parts Seven parts? Eight parts?