In Fig 2.7, if point A is shifted to point B along the ray PX such that PB = 2PA, then the measure of ∠BPY is

5

If a bicycle wheel has 48 spokes, then the angle between a pair of two consecutive spokes is

6

In Fig. 2.6, ∠XYZ cannot be written as

8

The number of angles in Fig. 2.8 is

9

The number of obtuse angles in Fig. 2.9 is