Proofs

Proofs Introduction

By Kimberly Lewis

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This is an example of a completed proof. It is proving that Vertical Angles are congruent.

What do you notice?

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This is an example of a completed proof. It is proving that Vertical Angles are congruent.

What do you wonder?

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Let's try one.....What do you notice?

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What do you wonder?

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What do you think should go as the first Statement? How do you know?

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What do you think should go as the second Statement? How do you know?

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What do you think should go as the third Reason? How do you know?

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What do you think should go as the last statement? How do you know?

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What do you think should go as the last Reason? Hint: We can't use "Alternate Interior Angles" as a Reason because that is what we are proving.

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What do you notice?

What do you wonder?

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What do you think we should do to prove that

<1+<2 = 180? Hint: We can use any reason to prove it as long as we don't use "Same Side Interior Angles" as a reason.