Physics, 11.09.2019 01:30, andy3646

Use vectors to decide whether the triangle with vertices p(1, −2, −1), q(2, 1, −3), and r(6, −1, −4) is right-angled. yes, it is right-angled. no, it is not right-angled.

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Use vectors to decide whether the triangle with vertices p(1, −2, −1), q(2, 1, −3), and r(6, −1, −4)...