In this lesson, we will learn how to prove certain geometric properties using deductive proof.

Students will be able to

Q1:

Consider two lines that intersect.

How many pairs of vertically opposite angles exist?

What is the sum of the angles around the point of intersection?

Q2:

True or False: If two straight lines intersect, each two vertically opposite angles are equal in measure.

Q3:

For the shape below, is it right that 𝑚∠𝐴=50∘?

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