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Find the lengths of the sides of the triangle PQR. (5, −2, −1), Q(9, 0, 3), R(11, −4, −1) |PQ| = |QR| = |RP| = Is it a right triangle? Yes No Is it an isosceles triangle? Yes No

Find the lengths of the sides of the triangle PQR. (5, −2, −1), Q(9, 0, 3), R(11, −4, −1) |PQ| = |QR| = |RP| = Is it a right triangle? Yes No Is it an isosceles triangle? Yes No

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Find the lengths of the sides of the triangle P Q R .
| P Q | = ◻ | Q R | = ◻ ( 5 , − 2 , − 1 ) , Q ( 9 , 0 , 3 ) , R ( 11 , − 4 , − 1 ) | R P | = ◻
Is it a right triangle? Yes No Is it an isosceles triangle? Yes No

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