9000107504

SubArea: 
Plane geometry
Level: 
B
Project ID: 
9000107504
Accepted: 
1
Clonable: 
0
Easy: 
0
Find the angle between the lines \[ p\colon 2x - 3y + 1 = 0;\quad q\colon 3x + 2y - 3 = 0. \]
\(90^{\circ }\)
\(60^{\circ }\)
\(0^{\circ }\)
\(30^{\circ }\)