If we could pick up one of the parallel lines and move it on top of the other, we would see that the angles created around the vertex are the same. The.

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Presentation transcript:

If we could pick up one of the parallel lines and move it on top of the other, we would see that the angles created around the vertex are the same. The angles that would lie on top of each other are called corresponding angles… so this angle, would fit over this angle, we say they are corresponding. Corresponding angles are equal.

a b d c e f h g Are angles a and c corresponding? They are equal, but we already have a name for them, they are opposite angles. Corresponding should be the same just by considering movement.

There are two pairs… alternate angles are equal

a b d c e f h g Are angles d and g alternate?

Sometimes called interior angles, they add up to 180 degrees.

a b d c e f h g Are angles a and h co-interior?

h a i b j k c d l m e f n o h g Which angle is corresponding with… Which angle is alternate with b? Give me a pair of angles that are co-interior.. How many pairs are there?

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