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Mathematics, 28.06.2020 18:01 drewje12

Below is a two-column proof incorrectly proving that the three angles of ΔPQR add up to 180°:

Below is a two-column proof incorrectly proving that the three angles of ΔPQR add up to 180°:

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Below is a two-column proof incorrectly proving that the three angles of ΔPQR add up to 180°:
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