Eight.
Yes. They're in the plane defined by the two intersecting lines.
20....or maybe 18
vertical angles
Vertical Angles
equal vertical angles
Yes. They're in the plane defined by the two intersecting lines.
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.
equal vertical angles
yes
Vertical angles