A) Equilateral triangle
B) Right-angled triangle
C) Isosceles triangle
D) Scalene triangle
Correct Answer: B
Solution :
Since \[PQ=\sqrt{68},\,\,PR=\sqrt{17},\,\,QR=\sqrt{85}\] \[\therefore \,\,P{{Q}^{2}}+P{{R}^{2}}=Q{{R}^{2}}\], i.e. right angled triangle.
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