acy adjusts the width of a compass equal to CD and draws an arc from R, as shown below.

What is Macy constructing?

an obtuse angle CDR
a scalene triangle CDR
a line segment parallel to CD
a line segment congruent to CD

Question

acy adjusts the width of a compass equal to CD and draws an arc from R, as shown below.
 
 

 
 
What is Macy constructing?


		an obtuse angle CDR
		a scalene triangle CDR
		a line segment parallel to CD
		a line segment congruent to CD

swag · Answer

attachment

directrix · Answer

I think: a line segment congruent to CD.

However, she did not draw a working segment at the start. All points on the arc she drew are at distance CD from R.