$r$ is the radius and $l$  is the length of an arc. The area of a sector is ______.

State true or false:

Say true or false:

A circular disc of radius $10 cm$ is divided into sectors with angles $120^o$ and $150^o$, then the ratio of the area of two sectors is

The region between an arc and two radii joining the centre to the end points of the arc is called

Which of the following is not a sector of a circle?

Circular dome is a 3D example of which kind of sector of the circle?

Points $A,B,C $ are on a circle, such that $m(arc AB)=m(arc BC)=^o$. No point, except point $B$, is common to the arcs.which is the type of $\triangle ABC$?

Find the area of a sector of a circle with radius $6$cm if angle of the sector is $60^o$.

Consider a circle with unit radius. There are seven adjacent sectors, $S _1, S _2, S _3, ............ S _7$, in the circle such that their total area is $\dfrac {1}{8}$ of the area of the circle. Further, the area of the $j^{th}$ sector is twice that of the $(j-1)^{th}$ sector, for $j$ $=$ $2, ........... 7$. What is the area of sector $S _1?$

The angle subtended by the chord AB in the minor arc of S is - 

The length of minor arc $\overset{\frown}{AB}$ of a circle is $\dfrac{1}{4}$ of its circumference, then the measure of the angle subtended by the minor arc $\overset{\frown}{AB}$ will be ....

With a given centre and a given radius,only one circle can be drawn.

If angle of sector is $x^o$, then formula used to calculate area is

If the circumference of a circle is $8$ units and arc length of major sector is $5$ units then find the length of minor sector.

The angle subtended at the centre of a circle of radius $3cm$ by an arc of length $1cm$ is:

Write True or False:

In $\bigodot (P, 6)$, the length of an arc is $\pi$. Then the arc subtends an angle of measure ___at the center.