Page 66 - Maths Class 06

Chord A line segment with its PQ is a chord. P Q A chord can be of any
endpoints on the circle. length. It may or may not
pass through the centre.
The longest chord is the
diameter of the circle.

Arc A part of a circle between PQR is an arc. Q It can be of any length.The
any two points on the P R bigger (or longer) arc is
circle. called the major arc and the
smaller arc is called the
minor arc.

Segment A chord divides a circle Q PQR is the minor segment.
into two parts called P R RSP is the major segment.
segments.

Sector The region enclosed by sector AOB R The smaller sector is called
two radii and an arc. O minor sector and the bigger

sector is called major sector
A B

Semicircle Half a circle Diameter of a circle divides
O it into two semicircles.

Exercise 4.3

1. Which of the following figures are quad rilaterals?
(a) (b) (c) (d) (e)

(f) (g) (h) (i)

C

B
D
2. In the adjoin ing figure, ABCD is a quad rilateral. Name its four sides, the
four angles and the two diagonals.

A
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