Intro to the Safety Compass Practice

  1. Put your name and period in upper right of paper.
  2. Put a dot near the upper left of the page and label it A.
  3. Hold the ORANGE part of the compass and use one of the small holes on the WHITE pivot to make a circle with A as the center.
  4. Label the circle “Circle A”.

 

  1. Put a dot near the upper RIGHT of the page and label it B.  The next circle will be larger so place it accordingly.
  2. Hold the WHITE part of the compass (press one finger down on the middle) and use one of the holes on the ORANGE arm to make a circle with B as the center.
  3. Label the circle “Circle B”.

 

  1. Put a dot near the middle of the  bottom half of the page and label it C. (so 3/4 down the page)
  2. Make FOUR different size circles using C as the center.
  3. Label the drawing “Concentric Circles with center  C”.

 

  1. Turn the paper over.  On the top half of the paper draw a circle with about a 2 inch radius and a marked center D.  NOTE:  A 2 inch radius is about 10 holes from the center along the orange arm.  Make sure you can find this exact same hole again!!
  2. Put a point ON the circle and label it E.
  3. Using point E as a center make a PARTIAL CIRCLE (an arc) of the same size you just made.  The ends of the arc STOP at the edge of circle D.  If you are doing this correctly, the arc will pass through the center of D.
  4. Label the points at the ends of the arcs, F and J.
  5. Using point F as a center make a PARTIAL CIRCLE (an arc) of the same size you just made.  The ends of the arc STOP at the edge of circle D.  If you are doing this correctly, the arc will pass through the center of D and one end will be at point E.
  6. Label the one new point, G.
  7. Continue this pattern using points G, H, I, and J as centers.
  8. You’ve just create a daisy
  9. Using a Straight-Edge connect the adjacent points (F to G, G to H, H to I, and so on).
  10. You’ve just created a perfect (regular) hexagon.
  11. Label the drawing “My daisy and hexagon”

For the bottom half of the paper,

  1. Draw an approximately 2 inch HORIZONTAL line in the middle of the bottom half.
  2. Label the endpoints M and N.
  3. Draw a circle with M as a center that reaches exactly to N (this will make MN the radius of circle M).
  4. Draw a second circle of the same radius size but using N as the center.
  5. Label the 2 intersections of the circles as P and Q.
  6. Use a straight-edge to connect P and Q.
  7. Label this drawing as “Perpendicular Bisector”

 

If you have more time, you may do another design for more credit on a SEPARATE sheet of paper.

See some more designs here

http://www.broug.com/learn_polygons.htm

http://www.geometrycode.com/free/seed-of-life-pattern-construction-using-compass/

One Response to Intro to the Safety Compass Practice

  1. natalia says:

    this assignment was very complicated, but with more practice i kept on getting better and better. i suggest we do more assignments like this, so people can become more familiar with the topic.

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