**Question 14:**  
"**Dalam suatu reuni dihadiri oleh 8 orang. Jika mereka berjabat tangan masing-masing satu kali, maka banyak jabat tangan pada reuni tersebut adalah ....**"

This problem is asking for the number of handshakes at a gathering where 8 people attend, and each pair of people shakes hands exactly once.

### Solution:
The formula to determine the number of unique handshakes in a group of \(n\) people is:

\[
\text{Handshakes} = \frac{n(n - 1)}{2}
\]

Where \(n\) is the number of people. For this case, \(n = 8\):

\[
\text{Handshakes} = \frac{8(8 - 1)}{2} = \frac{8 \times 7}{2} = \frac

Dalam suatu reuni dihadiri oleh 8 orang. Jika mereka berjabat tangan masing-masing satu kali, maka banyak jabat tangan pada reuni tersebut adalah ....

Discover how to calculate the number of handshakes at a reunion with 8 attendees using combinatorial principles. This problem involves the application of the handshake formula, suitable for students in Grades 6-8.

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