Selina Concise Mathematics class 7 ICSE Solutions

Lines And Angles Class 7. APlusTopper.com provides step by step solutions for Selina Concise ICSE Solutions for Class 7 Mathematics. You can download the Selina Concise Mathematics ICSE Solutions for Class 7 with Free PDF download option. Selina Publishers Concise Mathematics for Class 7 ICSE Solutions all questions are solved and explained by expert mathematic teachers as per ICSE board guidelines.

Question 1.

State, true or false :

(i) A line segment 4 cm long can have only 2000 points in it.

(ii) A ray has one end point and a line segment has two end-points.

(iii) A line segment is the shortest distance between any two given points.

(iv) An infinite number of straight lines can be drawn through a given point.

(v) Write the number of end points in

(a) a line segment AB (b) arayAB

(c) alineAB

(vi) Out of [latex]\overleftrightarrow { AB }[/latex] , [latex]\overrightarrow { AB }[/latex] , [latex]\overleftarrow { AB }[/latex] and [latex]\overline { AB }[/latex] , which one has a fixed length?

(vii) How many rays can be drawn through a fixed point O?

(viii) How many lines can be drawn through three

(a) collinear points?

(b) non-collinear points?

(ix) Is 40° the complement of 60°?

(x) Is 45° the supplement of 45°?

Solution:

(i) False : It has infinite number of points.

(ii) True

(iii) True

(iv) True

(v) (a) 2 (b) 1 (c) 0

(vi) AB

(vii) Infinite

(viii) (a) 1 (b) 3

(ix) False : 40° is the complement of 50° as 40° + 50° = 90°

(x) False : 45° is the supplement of 135° not 45°.

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