Prove that the tangents drawn at the ends of a diameter of a circle are parallel.
Prove that the parallelogram circumscribing a circle is a rhombus.
In the given figure, if AB is a tangent to the circle with centre O such that OB = 6 cm and ∠AOB = 60°, then the length of OA is :
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.
In the given figure, TP and TQ are tangents at points P and Q of the circle respectively. If reflex ∠ POQ = 250°, find the measure of each angle of quadrilateral POQT.
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