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Prove that the parallelogram circumscribing a circle is a rhombus.
Prove that a rectangle circumscribing a circle is a square.
In the given figure, △ ABC circumscribes a circle. If AR = 3 cm, BP = 4 cm and QC = 5 cm, find the perimeter of △ ABC.
PQ and PR are tangents to the circle of radius 3 cm and centre O. If length of each tangent is 4 cm, then perimeter of △ OQP is :
PQ and PR are tangents to a circle with centre O such that OQ = QP. The value of ∠OPQ is equal to
The given figure shows a circle with centre O and radius 4 cm circumscribed by △ABC. BC touches the circle at D such that BD = 6 cm, DC = 10 cm. Find the length of AE.
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