- What are five ways to prove two lines are parallel?
- Can lines be congruent?
- What proves two lines are parallel?
- Are linear pair angles always congruent?
- Are same side interior angles supplementary or congruent?
- Are interior angles congruent?
- Are all obtuse angles congruent?
- What does alternate interior angles mean?
- Do same side interior angles have the same measure?
- Which pair of angles are alternate interior angles?
- What does congruent mean?
- How do you know if angles are congruent?
- What is interior angles on the same side of the transversal?
- What angles are congruent?
- Are all parallel lines congruent?
- Are same side interior angles a linear pair?

## What are five ways to prove two lines are parallel?

Ways to Prove Two Lines ParallelShow that corresponding angles are equal.Show that alternative interior angles are equal.Show that consecutive interior angles are supplementary.Show that consecutive exterior angles are supplementary.In a plane, show that the lines are perpendicular to the same line..

## Can lines be congruent?

Line segments are congruent if they have the same length. However, they need not be parallel. They can be at any angle or orientation on the plane. … Rays and lines cannot be congruent because they do not have both end points defined, and so have no definite length.

## What proves two lines are parallel?

If two parallel lines are cut by a transversal, then corresponding angles are congruent. If two lines are cut by a transversal and corresponding angles are congruent, then the lines are parallel.

## Are linear pair angles always congruent?

The sum of a linear pair of angles is 180 degrees, hence are supplementary. Linear pairs of angles can only be congruent when the measure of each of the angles is 90 degrees. Linear pairs of angles are not always congruent. Vertical angles are each of the pairs of opposite angles made by two intersecting lines.

## Are same side interior angles supplementary or congruent?

Same side interior angles are two angles that are on the same side of the transversal and on the interior of (between) the two lines. Same Side Interior Angles Theorem: If two parallel lines are cut by a transversal, then the same side interior angles are supplementary.

## Are interior angles congruent?

All angles that are either exterior angles, interior angles, alternate angles or corresponding angles are all congruent. The picture above shows two parallel lines with a transversal.

## Are all obtuse angles congruent?

An acute angle is any angle that measures less than 90°. An obtuse angle measures greater than 90° but less than 180°. … Two angles that have the same measure are called congruent angles.

## What does alternate interior angles mean?

Definitions. If two parallel lines are transected by a third line, the angles which are inside the parallel lines and on alternate sides of the third line are called alternate interior angles. … the angles which are inside the parallel lines and on the same side of the third line are called opposite interior angles.

## Do same side interior angles have the same measure?

Same-side interior angles are NOT always congruent. In fact, the only time they are congruent (meaning they have the same measure) is when the…

## Which pair of angles are alternate interior angles?

When two lines are cut by a transversal, the pairs of angles on either side of the transversal and inside the two lines are called the alternate interior angles .

## What does congruent mean?

Congruent means same shape and same size. So congruent has to do with comparing two figures, and equivalent means two expressions are equal. So to say two line segments are congruent relates to the measures of the two lines are equal.

## How do you know if angles are congruent?

Definition: Angles are congruent if they have the same angle measure in degrees. Try this Adjust any angle below by dragging an orange dot at its ends. The other angle will change to remain congruent with it. Angles are congruent if they have the same angle measure in degrees.

## What is interior angles on the same side of the transversal?

When a transversal intersects two lines, the two lines are parallel if and only if interior angles on the same side of the transversal and exterior angles on the same side of the transversal are supplementary (sum to 180°).

## What angles are congruent?

Congruent angles are angles with exactly the same measure. Example: In the figure shown, ∠A is congruent to ∠B ; they both measure 45° . Congruence of angles in shown in figures by marking the angles with the same number of small arcs near the vertex (here we have marked them with one red arc).

## Are all parallel lines congruent?

If two parallel lines are cut by a transversal, the alternate exterior angles are congruent. If two lines are cut by a transversal and the alternate exterior angles are congruent, the lines are parallel. Corresponding Angles: The name does not clearly describe the “location” of these angles.

## Are same side interior angles a linear pair?

Since alternate interior and alternate exterior angles are congruent and since linear pairs of angles are supplementary, same side angles are supplementary.