1. Duplicating Segments and Anlges
Objective: Students will use a compass and straight edge to copy and construct segments and angles.

2. Types of Pictures
Sketch – freehand drawing of something, sketch a right triangle, not exact Drawing – using tools to accurately measure lengths and angles Construction – using a compass and straight edge, not exact measurements, neater than a sketch but not as accurate as a drwaing

3. Duplicating a Segment
Investigation pg 145

4. Process
Draw a ray, this should be longer then segment you are constructing
Place pointy end of compass on one endpoint and pencil on the other – this is measuring the distance using a compass
Place the pointy end of compass on endpoint of ray, swing arc so it intersects the ray
Mark the intersection with a point

5. Multiple Segments
How would you combine multiple segments or subtract?

6. Duplicating an Angle
Investigation pg 146

7. Process
Draw a ray
Place pointy end of compass on vertex of the angle then swing an arc so it intersects both sides – there is already an arc to use when copying an angle from the book
Put pointy end of compass on the endpoint of ray and swing the arc from step 2, make sure it crosses the ray and goes more than what the angle look
On original angle place the pointy end of compass on one intersection and place pencil on second intersection – this measure the distance of the arc
Place pointy end of compass on intersection of arc and ray, swing compass until two arcs intersect
Connect endpoint and intersection

8. Multiple Angles
How would you combine multiple angles or subtract?

9. Objective: Students will use a compass and straight edge to copy and construct segments and angles. On a scale of 1 to 4 Do you feel we meet the objective for the day. If we did not meet the objective, what did we miss and how could I improve.

10. Homework
Pg and 8