Ask a New Question
Menu

What is the construction that needs to be done to make a copy of angle LJK?

Using a compass, measure the length from point J to K. Then, make another arc by placing the pointed end of the compass on point R and draw a small arc that intersects the larger arc above point Q.
Using a straight edge, construct a vertical line from point Q that intersects with the arc. Then find that angle's bisector.
Using a compass, measure the length from point L to K. Then, make another arc by placing the pointed end of the compass on point R and draw a small arc that intersects the larger arc above point Q.
Using a compass, measure the length from point J to L. Then, make another arc by placing the pointed end of the compass on point R and draw a small arc that intersects the larger arc above point Q.

3 answers

To accurately describe the steps needed to construct a copy of angle \( LJK \) using a compass and straightedge, here’s the correct sequence of steps:

  1. Draw angle \( LJK \): Start with angle \( LJK \) that you want to copy.

  2. Select a point for the vertex of the new angle: Choose a point \( R \) where you want to create the new angle.

  3. Using a compass, measure the length from point \( J \) to point \( K \): Place the compass point on \( J \) and adjust its width to point \( K \). This distance will be used to replicate this arc in the new angle.

  4. Draw an arc based on point \( R \): With the compass set to the length \( JK \), place the pointed end of the compass on point \( R \) and draw an arc that intersects the line extended from point \( R \) (this will be one side of your new angle).

  5. Label the intersection point: Call the intersection point where the arc meets the line extended from \( R \) point \( Q \).

  6. Construct an arc from point \( Q \): Without changing the compass width, place the compass on \( K \) and draw an arc that intersects the arc drawn in step 4 at a new point.

  7. Finding the angle's bisector: While the original instructions mention constructing a vertical line and finding the angle's bisector, we actually only need to construct a line from \( R \) through point \( Q \) at this point to complete the angle.

  8. Complete the angle: Now, using a straight edge, connect point \( R \) to point \( Q \) and mark the intersection that forms angle \( RQK \).

  9. Copy the additional side \( LJ \): Finally, to ensure the angles are congruent, you would need to measure the distance \( JL \) and repeat the arc-drawing process through \( R \) as in previous steps.

By following these steps, you will have successfully constructed a copy of angle \( LJK \) at point \( R \).

so which answer is it

Based on the steps I outlined, the correct answer to copy angle \( LJK \) is closely aligned with the following option (with some adjustments for clarity):

  1. Using a compass, measure the length from point \( J \) to \( K \) (this is the width of the angle).
  2. Then, place the pointed end of the compass on point \( R \) and draw a small arc that crosses the line extending from \( R \) (which will create an intersection point, let's call it \( Q \)).
  3. Using the same measurement from point \( J \) to \( K \), draw an arc from point \( Q \) that intersects the previous arc.
  4. Using a straightedge, draw a line from point \( R \) through point \( Q \) to complete the angle \( RQK \).

Thus, the focus should be primarily on copying the arc from \( JK \) and placing it appropriately relative to point \( R \) on the new angle, thereby replicating angle \( LJK \).

Overall, if we consolidate the tasks into a coherent series of movements suited for the construction, we simplify the instructions down to steps 1, 2, and 4 above.

So, your final answer is: "Using a compass, measure the length from point J to K. Then, place the pointed end of the compass on point R and draw a small arc that intersects the larger arc above point Q."

This captures the essence of the construction for copying angle \( LJK \).