Q72 of 78 Page 23

In Fig. 2.46 how many line segments are there? Name them.

There are total 10 line segments:


AB, AD, AE, AC, BD, BE, BC, DE, DC, EC.


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70

In Fig. 2.45 how many line segments are there? Name them.

 71

In Fig. 2.46, how many points are marked? Name them.

 73

In Fig. 2.47, O is the centre of the circle.


(a) Name all chords of the circle.


(b) Name all radii of the circle.


(c) Name a chord, which is not the diameter of the circle.


(d) Shade sectors OAC and OPB.


(e) Shade the smaller segment of the circle formed by CP.

 74

Can we have two acute angles whose sum is

(a) an acute angle? Why or why not?


(b) a right angle? Why or why not?


(c) an obtuse angle? Why or why not?


(d) a straight angle? Why or why not?


(e) a reflex angle? Why or why not?