Yes. They're in the plane defined by the two intersecting lines.
Eight.
20....or maybe 18
Vertical Angles
vertical angles
Vertical angles
Eight.
20....or maybe 18
vertical
No. The non-vertical angles need not be related to one another in any way.
Vertical
IN
vertical angles
Vertical Angles
False. The angles can be formed by two skew lines intersecting a third line.
Vertical angles
equal vertical angles
yes