DIRECTIONS : Count the number of cubes in each of the following figures.
1. | |||
---|---|---|---|
A. 13 B. 15 |
|||
C. 17 D. 19 Ans : A. The figure may be labelled as shown. The horizontal lines are IJ, AB, EF, MN, HG, DC and LK. i.e., 7 in number. Thus, there are 7 + 6= 13 straight triangles in the given figure. |
2. | |||
---|---|---|---|
A. 5 B. 6 |
|||
C. 8 D. 10 Ans : D. We may label the figure as shown. The triangles composed of three components each EBH, AIC, EFC, ADG and BJD i.e., 5 in figure. Thus, there are 4 + 5= 10 triangles in the given figure. |
3. | |||
---|---|---|---|
A. 16 B. 18 |
|||
C. 14 D. 15 Ans : B. We may label the figure as shown. The simplest triangles are BFG, CGH, EFM, FMG, GMN, GHN, HNI, LMK, MNK and KNJ i.e., 10 in figure. Thus, there are 10 + 2 + 4 + 2= 18 triangles in the given figure. |
4. | |||
---|---|---|---|
A. 9 B. 11 |
|||
C. 15 D. 16 Ans :B. We shall label the figure as shown. The horizontal lines are DE, FH, IL and BC i.e. 4 in number. The slanting lines are AC, DO, FN, IM, AB, EM and HN i.e. 7 in number. Thus, there are 4 + 7 = 11 staright lines in the figure. |
5. | |||
---|---|---|---|
A. 11 B. 13 |
|||
C. 15 D. 17 Ans : C. The simplest triangles are AKI,AIL,EKD,LFB, DJC, BJC, DHC and BCG I.e. 8 in number. |
No comments:
Post a Comment