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Which of the following statements about triangle PQR shown in the xy-p

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Which of the following statements about triangle PQR shown in the xy-p  [#permalink]

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New post 10 Dec 2019, 02:14
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A
B
C
D
E

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  75% (hard)

Question Stats:

56% (02:37) correct 44% (02:24) wrong based on 35 sessions

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Which of the following statements about triangle PQR shown in the xy-plane are true? Indicate all such statements.

I. PQR is a right triangle.
II. The area of PQR, is \(\frac{15}{2}\).
III. PQR is an isosceles triangle.

A. I only
B. II only
C. III only
D. I and II only
E. I, II, and III


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Re: Which of the following statements about triangle PQR shown in the xy-p  [#permalink]

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New post 10 Dec 2019, 02:45
My Answer is (D), i.e. I and II only

PQ^2 = 50
QR^2 = 5
PR^2 = 45

Because 50 = 5 + 45, PQR is a right triangle.
Now, its area is 1/2 * SQRT(5)*SQRT(45) = 15/2 = 7.5
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Re: Which of the following statements about triangle PQR shown in the xy-p   [#permalink] 10 Dec 2019, 02:45
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Which of the following statements about triangle PQR shown in the xy-p

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