Introduction to Circles
A sector is the area enclosed by two radii and a chord.
A circle divides the plane on which it lies into three parts.
The mid point of any diameter of a circle is the centre.
The area enclosed by a chord and the major arc is major segment.
If AB is a chord which passes through the centre O of a circle, then what is AB known as?
Diameter of the circle
Radius of the circle
Sector of the circle
Segment of the circle
Find the circumference of the circle from the figure.
The perimeter of a circle is called its ____.
What is the circumference of a circle of radius 7 cm?
A sector with a central angle greater than 180∘ is called a ____ of the circle.
The circumference of a circle of radius r is given by ___.