ACompassis an instrument used to draw circles or the parts of circles called arcs.It consist of two movable arms hinged together where one arm has a pointed end and the other arm holds a pencil.
Note that a compass is also called a pair of compasses.
Number 2:
Parts of a Circle
An arcis a part of the circumference. A sectoris the part of a circle between two radii.
A segmentis the part of a circle that is between a chord and the circumference.
A semicircleis a half of a circle.
More Information:
Note:
The plural of radius is radii.
Lines in a Circle
The name of a line in a circle depends on its position in the circle.
A secantis a line that passes through any two points on a circle.
A chord is a line that joins two points on the circumference of a circle.
The diameteris a chord that passes through the centre of a circle.
A tangentis a line that touches the circle at only one point.
Remember:
A circleis a set of points in a plane that are the same distance from a fixed point (called the centre). These set of points form the perimeterof the circle.
The radiusis the distance from the centre of the circle to any point on its perimeter.
The circumferenceof a circle is the perimeter of the circle.
Answers & Comments
ANSWER:
Number 1:
A Compass is an instrument used to draw circles or the parts of circles called arcs. It consist of two movable arms hinged together where one arm has a pointed end and the other arm holds a pencil.
Number 2:
Parts of a Circle
An arc is a part of the circumference. A sector is the part of a circle between two radii.
A segment is the part of a circle that is between a chord and the circumference.
A semicircle is a half of a circle.
More Information:
Note:
The plural of radius is radii.
Lines in a Circle
The name of a line in a circle depends on its position in the circle.
Remember:
A circle is a set of points in a plane that are the same distance from a fixed point (called the centre). These set of points form the perimeter of the circle.
The radius is the distance from the centre of the circle to any point on its perimeter.
The circumference of a circle is the perimeter of the circle.
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