3-3: Parallel Lines & Angles Unit 3: Geometry English Casbarro.

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Presentation transcript:

3-3: Parallel Lines & Angles Unit 3: Geometry English Casbarro

It is only when the lines are parallel that there are special congruent angles formed. But the angle names remain the same whether they are parallel or not.

You use the Same-Side Interior Angles Postulate to prove the other theorems.

Statements Reasons

Notice that this looks different from the other proofs you have done. This is called a flow proof. You list the things that you know, and use arrows to show where the logical progression goes.

Turn in the following problems Complete the following proof: Given: l || m Prove: Write a proof (2-column or paragraph) of the Same-Side Interior Angles Theorem. Given: r || s Prove: