They are called vertical angles
A pair of opposite equal angles are formed when two lines intersect each other.
Intersecting lines form two sets of angles. The angles opposite each other are always equal.
less than and right angles
They are equal
perpendicular lines no dur
intersecting lines are lines that block each other.
Perpendicular lines intersect each other at 90 degrees
Perpendicular lines are a possibility. This will only happen if the intersecting lines are exactly 90 degrees from each other.
Intersecting lines are lines that meet at a point. In other words lines that cross each other (like an X).
Either intersecting lines or perpendicular lines
The addition sign is formed by two intersecting lines, as is the cross. The two lines are perpendicular to each other.
All angles are formed by two intersecting lines. The pairs of angles opposite each other are called vertical angles. If two angles are vertical, they measure the exact same. Say you name the angles formed as A, B, C, and D. A and C are vertical and B and D are vertical. The angles next to each other formed by intersecting lines are supplementary, and add up to 180 degrees. That means A + B = 180 (since they are next to each other) and B+C = 180. Subtracting the first equation by the second equation gives us A + B - B - C = 180 - 180, which simplifies to A - C = 0, which further simplifies to A = C. The same can be said about B and D being equal.