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In this lesson, we will learn how to identify parallel lines and how to prove they are parallel using angle relationships.

Q1:

Which of the following correctly defines parallel lines?

Q2:

The figure shows a pair of parallel lines with a transversal drawn through them.

What name is given to the pairs of coloured angles highlighted in the figure.

What do you notice regarding the sizes of two corresponding angles?

Q3:

What name is given to the pairs of green and red angles highlighted in the figure?

What name is given to the pairs of blue and orange angles highlighted in the figure?

What do you notice regarding the sizes of two supplementary angles?

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