Ask your own question, for FREE!
Mathematics 7 Online
OpenStudy (anonymous):

Do circles have a directrix?

OpenStudy (anonymous):

at infinite distance

OpenStudy (anonymous):

Eqn of directrix is x = a/e or -a/e and e=0

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!