Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they, and how might you define them?
(i) parallel lines
(ii) perpendicular lines
(iii) line segment
(iv) radius of a circle
(v) square

Question

Filo · Accepted Answer

(i) Parallel line - Two lines are said to be parallel when (a) They never meet or never intersect each other even if they are extended to the infinity. (b) they coplanar.

(ii) Perpendicular lines - Two lines

A B

and

C D

lying the same plane are said to be perpendicular, if they form a right angle. We write

A B ⊥ C D

(iii) Line segment - A line-segment is a part of line. When two distinct points, say

A

and

B

on a line are given, then the part of this line with end-points

A

and

B

is called the line-segment.

(iv) Radius of a circle - The distance from the centre to a point on the circle is called the radius of the circle. In the following figure

OP

is the radius.

(v) Square - A quadrilateral in which all the four angles are right angles and four sides are equal is called a square.

A BC D

is a square.

Question Text	Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they, and how might you define them? (i) parallel lines (ii) perpendicular lines (iii) line segment (iv) radius of a circle (v) square
Answer Type	Text solution:1
Upvotes	151

Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they, and how might you define them?
(i) parallel lines
(ii) perpendicular lines
(iii) line segment
(iv) radius of a circle
(v) square

Text solutionVerified

Practice questions from similar books

Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they, and how might you define them?(i) parallel lines(ii) perpendicular lines(iii) line segment(iv) radius of a circle(v) square

Text solutionVerified

Practice questions from similar books

Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they, and how might you define them?
(i) parallel lines
(ii) perpendicular lines
(iii) line segment
(iv) radius of a circle
(v) square