Philosophy Now Forum

Hello, bubblyeducate, sheepishknow and Advocate. Thank you for the welcome.

Hi,
I am not a philosopher or a student of philosophy. However, I took an Intro to Philosophy course in college almost 20 years ago and remember enjoying it. In recent years, I've become interested in philosophy once again and here I am.

Why is Euclidean geometry synthetic and Cartesian geometry analytic? Both seem a priori to me.