Presentation Transcript
How to draw regular polygons :How to draw regular polygons by Zoe Williams
31 August 2008
Slide 2:An equilateral triangle Draw a circle with a compass.
Slide 3:Draw a circle with a compass.
Mark the center and top. An equilateral triangle
Slide 4:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? An equilateral triangle
Slide 5:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360° An equilateral triangle
Slide 6:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? An equilateral triangle
Slide 7:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3 An equilateral triangle
Slide 8:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3
Divide 360° by 3. An equilateral triangle
Slide 9:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3
Divide 360° by 3. 120° An equilateral triangle
Slide 10:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3
Divide 360° by 3. 120°
With a protractor, line up the middle dot and the top dot. An equilateral triangle
Slide 11:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3
Divide 360° by 3. 120°
With a protractor, line up the middle dot and the top dot.
Mark 120° from the top dot. An equilateral triangle
Slide 12:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3
Divide 360° by 3. 120°
With a protractor, line up the middle dot and the top dot.
Mark 120° from the top dot.
Repeat for the third corner. An equilateral triangle
Slide 13:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3
Divide 360° by 3. 120°
With a protractor, line up the middle dot and the top dot.
Mark 120° from the top dot.
Repeat for the third corner.
Connect the three dots on the circle. An equilateral triangle
Slide 14:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3
Divide 360° by 3. 120°
With a protractor, line up the middle dot and the top dot.
Mark 120° from the top dot.
Repeat for the third corner.
Connect the three dots on the circle. An equilateral triangle
Slide 15:Draw a circle with a compass.
Mark the center and top.
How many degrees are in a circle? 360°
How many corners are in a triangle? 3
Divide 360° by 3. 120°
With a protractor, line up the middle dot and the top dot.
Mark 120° from the top dot.
Repeat for the third corner.
Connect the three dots on the circle. An equilateral triangle
Slide 16:An equilateral hexagon How
do
I
start???
Slide 17:An equilateral hexagon Can you make a regular:
hexagon,
square,
pentagon,
septagon,
and octagon???
Slide 18:An equilateral hexagon Can you make a regular:
hexagon,
square,
pentagon,
septagon,
and octagon???
Slide 19:An equilateral hexagon Can you make a regular:
hexagon,
square,
pentagon,
septagon,
and octagon???
Slide 20:An equilateral hexagon Can you make a regular:
hexagon,
square,
pentagon,
septagon,
and octagon???
Slide 21:An equilateral hexagon Can you make a regular:
hexagon,
square,
pentagon,
septagon,
and octagon???
Slide 22:An equilateral hexagon Can you make a regular:
hexagon,
square,
pentagon,
septagon,
and octagon???