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Which of the following statements about triangle PQR shown i

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Which of the following statements about triangle PQR shown i [#permalink] New post 07 Nov 2019, 11:30
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Which of the following statements about triangle PQR shown in the xy-plane are true? Indicate all such statements.

A. PQR is a right triangle.
B. The area of PQR, is \(\frac{15}{2}\).
C. PQR is an isosceles triangle.
[Reveal] Spoiler: OA

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Re: Which of the following statements about triangle PQR shown i [#permalink] New post 23 Nov 2019, 16:36
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Slope QR = -1/2
Slope RP = 2
the lines QR and RP are perpendicular, PQR is a right triangle

\(QR=\sqrt{5}\)
\(RP=\sqrt{45}\)
\(Area of triangle PQR =(\sqrt{5}*\sqrt{45})/2=15/2\)

Distance PQ is not equal to distance QR or PR

Answer A,B
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Re: Which of the following statements about triangle PQR shown i [#permalink] New post 14 Jun 2020, 06:30
mouda wrote:
Slope QR = -1/2
Slope RP = 2
the lines QR and RP are perpendicular, PQR is a right triangle

\(QR=\sqrt{5}\)
\(RP=\sqrt{45}\)
\(Area of triangle PQR =(\sqrt{5}*\sqrt{45})/2=15/2\)

Distance PQ is not equal to distance QR or PR

Answer A,B


When 2 lines are perpendicular, so that makes it a right triangle?
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Re: Which of the following statements about triangle PQR shown i [#permalink] New post 14 Jun 2020, 09:15
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Yes

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Re: Which of the following statements about triangle PQR shown i   [#permalink] 14 Jun 2020, 09:15
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