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Are two angles congruent if and only if they are vertical? - Answers

Of course not. The right angles at the corners of my book are certainly not vertical with the right angles at the corners of your computer screen, but they're congruent. The "if" is true, but the "only if" is not. Verticality is sufficient but not necessary for congruence.



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Are two angles congruent if and only if they are vertical? - Answers

https://math.answers.com/algebra/Are_two_angles_congruent_if_and_only_if_they_are_vertical

Of course not. The right angles at the corners of my book are certainly not vertical with the right angles at the corners of your computer screen, but they're congruent. The "if" is true, but the "only if" is not. Verticality is sufficient but not necessary for congruence.



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https://math.answers.com/algebra/Are_two_angles_congruent_if_and_only_if_they_are_vertical

Are two angles congruent if and only if they are vertical? - Answers

Of course not. The right angles at the corners of my book are certainly not vertical with the right angles at the corners of your computer screen, but they're congruent. The "if" is true, but the "only if" is not. Verticality is sufficient but not necessary for congruence.

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      Of course not. The right angles at the corners of my book are certainly not vertical with the right angles at the corners of your computer screen, but they're congruent. The "if" is true, but the "only if" is not. Verticality is sufficient but not necessary for congruence.

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