<object:standard:ma.912.g.8.6>Macy adjusts the width of a compass equal to CD and draws an arc from R, as shown below.         What is...

<object:standard:ma.912.g.8.6>Macy adjusts the width of a compass equal to CD and draws an arc from R, as shown below.
 
 

 
 
What is Macy constructing?

[removed] a scalene triangle CDR

[removed] an obtuse angle CDR

[removed] a line segment congruent to CD

[removed] a line segment parallel to CD