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Triangle PQR circumscribes a circle with centre O and radius r cm such that  \( \angle\;PQR=90^0 \) . If  PQ=3 cm, QR=4 cm, then the value of r is:

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Important Questions on Geometry

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The largest angle of a triangle of sides 17 cm, 13 cm and 10 cm is:
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Given inside a circle, of radius 13 cm, point P is at a distance of 5 cm form the centre O. A chord XY of 25 cm is drawn through P, then XPYP is:
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There is a triangle with sides of any positive integer having area T1. Three squares are drawn on each side of triangle. The area of the squares S1, S2 and S3. What is the value of A if A=T1+S1+S2+S3.
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In ABC, PQ is parallel to BC. If AP:PB=1:2 and AQ=3 cm ; AC is equal to :.
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If in any triangle ABC the base, BC is produced in both ways, the sum of exterior angle B and C is:
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In an obtuse-angled triangle ABC, A is the obtuse angle and O is the orthocentre. If BOC=54°, then BAC is:
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In the following figure PQRS, then the value of x is:

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