WarmUp Lets use a compass to draw a













- Slides: 13
Warm-Up Let’s use a compass to draw a face. Draw a large circle. Draw two smaller circles for eyes. Use a ruler to draw a pointed nose. Draw a portion of a circle for a mouth. How did you do?
Constructing Segments and Angles EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Definitions A compass is used to measure the distance between two points. A circle is the set of points equidistant to a point. Compasses can be used to copy segments and angles. EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
How to copy a segment Copy a segment by following these steps: Draw a segment longer than the original segment. Measure the original segment with your compass by placing the endpoints of the compass on the endpoints of the original segment. Using the measurement, place the compass on one endpoint of the longer segment and mark the measurement. EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Watch this video if you are still unsure of how to do it. https: //www. youtube. com/watch? v=fx 5 s. Rk 70 KU 4 EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
How to copy an angle Original 1) Draw a ray. Copy EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Original Copy 2) Draw an arc by placing the compass on the vertex of the original angle. EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Original Copy 3) Copy the same arc. Do not change the width of the compass. Use the same hole. EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Original Copy 4) Use your compass to measure the distance between the intersection of the arcs and rays of the original. . EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Original Copy 5) Use the same measurement and mark it on your copy. EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Original Copy 6) Connect the vertex and intersection. Be sure to make arrows at the end of your rays. EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Watch this video if you are still unsure of how to do it. https: //www. youtube. com/watch? v=38 dkb_0 egj. U EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.
Homework If you have a compass at home, practice copying segments and angles. Review your notes and write up your questions and summary. EQ: How do we construct segments and angles? We will write and discuss steps about how to use a compass to construct segments and angles.