The reciprocal of is 1\( \frac{2}{3} \)
2\( \frac{2}{3} \)
\( \frac{3}{5} \)
3 \( \frac{1}{2} \)
\( \frac{2}{3} \)
If the survey data (in cm) of height of 50 girls of class X in a school are as follows: Find the median of their height
| Length (in cm) | Number of girls |
| Less than 140 cm | 4 |
| Less than 145 cm | 11 |
| Less than 150 cm | 29 |
| Less than 155 cm | 40 |
| Less than 160 cm | 46 |
| Less than 165 cm | 50 |

The number of triangles in the above image is: