Selina solutions

# Question 1

Q1) 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) array AB

(c) a lineAB

(vi) Out of \overline{AB},\overrightarrow{AB,}\ \ \ \overline{AB,}\ \ \ and\ \overline{\ AB} 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:

1) False : It has infinite number of point.

2) True

3) True

4) True

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

6) AB

7) Infinite

8) (a) 1 (b)3

9) False : 40 is the complement of 50 as 40 + 50 = 90

10) False : 45 is the supplement of 135 not 45 .

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