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Q: How many pairs of congruent angles will be formed when two parallel lines are intersected by other two parallel lines?

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When two parallel lines are both intersected by a tranversal which is a nonvertical line, otherwise all angles formed by that intersection are right angles.

If the transversal is at right angles, then all the angles will be right angles. If not, there will be only two different measures between the eight angles formed. These will alternate.

Sure. Just as long as the transversal is perpendicular to the parallel lines.

Providing that the lines are parallel that the transversal passes through then it will have two equal alternate angles that are on opposite sides of the transversal.

vertical angles are always congruent...they are two nonadjacent angles formed by intersecting lines. Vertical angles are congruent..or equal in measure

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When two parallel lines are both intersected by a tranversal which is a nonvertical line, otherwise all angles formed by that intersection are right angles.

If the transversal is at right angles, then all the angles will be right angles. If not, there will be only two different measures between the eight angles formed. These will alternate.

There are at least 28 different pairs of angles: 66 if the first two lines are not parallel. Your question needs to be more specific as to which angles you mean.

Sure. Just as long as the transversal is perpendicular to the parallel lines.

Providing that the lines are parallel that the transversal passes through then it will have two equal alternate angles that are on opposite sides of the transversal.

these angles are called intersecting lines

Angles that are pairs of opposite and congruent lines formed by intersecting lines are intersections

vertical angles are always congruent...they are two nonadjacent angles formed by intersecting lines. Vertical angles are congruent..or equal in measure

No angles are formed on the inside of parallel lines because they do not intersect. That is the definition of parallel.

Perpendicular is when opposite angles that are formed when two lines intersect and are congruent called?

Adjacent angles

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