Online Course Discussion Forum

Math Challenge II-A 7.17

 
 
Picture of Grace Liu
Math Challenge II-A 7.17
by Grace Liu - Sunday, 29 October 2017, 2:18 PM
 

I don't get how it says arc AC is 135 degrees then asks what the measure of arc AC is, and I also don't understand where point D is.

 
Picture of Ethan Song
Re: Math Challenge II-A 7.17
by Ethan Song - Sunday, 29 October 2017, 9:23 PM
 

I just put 135.

Picture of David Reynoso
Re: Math Challenge II-A 7.17
by David Reynoso - Monday, 30 October 2017, 10:58 AM
 

The wording on the problem was not correct. It is supposed to have the same setup as problem 7.8 on the handout, without saying that $\widehat{AB}$ was $135^\circ$. 

The problem should say "Suppose $\omega$ is a circle with radius $6$ and center $O$. Let $A$, $B$ and $C$ be points on $\omega$ such that $\overline{OA} \parallel \overline{BC}$. What angle does $\widehat{AB}$ have to be so that $OACB$ is a parallelogram?"

The problem is now updated on the HW and will be given correct to all students.