Q30 of 78 Page 23

The number of common points in the two angles marked in Fig. 2.21 is ______.

4

They are D, E, F, and G.


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28

The number of common points in the two angles marked in Fig. 2.19 is _____.

 29

The number of common points in the two angles marked in Fig. 2.20 ______.

 31

The common part between the two angles BAC and DAB in Fig. 2.22 is _______.

 32

A horizontal line and a vertical line always intersect at right angles.