Unless the alternate interior vertical angles are 90° then they will not add up to 180°. If the alternate interior angles are obtuse, then adding them together will result in a number higher than 180°. Therefore, if the alternate interior angles are acute, then adding them together will result in a number below 180°.

What are alternate angles in a triangle?

Alternate angles are angles that occur on opposite sides of the transversal line and have the same size. We can often spot interior alternate angles by drawing a Z shape: There are two different types of alternate angles, alternate interior angles and alternate exterior angles.

What is an example of a vertical angle?

Vertical angles are supplementary angles when the lines intersect perpendicularly. For example, ∠W and ∠ Y are vertical angles which are also supplementary angles.

Which is the corresponding angle to ∠ 1?

∠2 ≅ ∠60° since they are corresponding angles, and m and n are parallel. ∠1 and ∠2 form a straight angle, so∠1=120°.

Is alternate angle equal?

When two parallel lines are crossed by a transversal, the pair of angles formed on the inner side of the parallel lines, but on the opposite sides of the transversal are called alternate interior angles. These angles are always equal.

Do vertical angles equal 180?

Facts About Vertical Angles-

Vertical angles are always congruent that are of equal measure. Both pairs of vertical angles (four angles altogether) always sum up to 360 degrees. Angles from each pair of vertical angles are known as adjacent angles and are supplementary (the angles sum up to 180 degrees).

What is an example of horizontal?

The definition of horizontal is something that is parallel to the horizon (the area where the sky seems to meet the earth). An example of a horizontal line is one that goes across the paper.

Which line is vertical?

What is vertical and horizontal line? A vertical line is a line, parallel to y-axis and goes straight, up and down, in a coordinate plane. Whereas the horizontal line is parallel to x-axis and goes straight, left and right.