The arc of a circle 50 cm long, subtends angle of 75° at the center of the circle. Find correct to 3 significant figures, the radius of the circle. Take \(\pi = \frac{22}{7}\)
The area of a circle is 38.5cm2. Find its diameter [take \(\pi = \frac{22}{7}\)]
In the diagram, KS is a tangent to the circle centre O at R and ∠ROQ = 80º. Find ∠QRS.
An arc of circle of radius 2cm subtends an angle of 60º at the centre. Find the area of the sector
If a circular paper disc is trimmed in such a way that its circumference is reduced in the ratio 2:5, In what ratio is the surface area reduced?
