Answer:
20 x 19 = 380 hands touched
380/2 = 190 handshakes
Step-by-step explanation:
Answer: 190 handshakes
The first will shake 19 hands, the second 18 hands and so on......the 19 th will shake one hand
so 19+18+17+.....+1=19*20/2=19*10=190 handshakes
It is ok now?
32 ; 20
Middle section: 26
Sum of parallel lengths: 2 × 26 = 52
Ratio of the sides:
100% : 62.5%
8 : 5
5/(8+5) × 52
20
8/(8+5) × 52
32
2/3 full = 23 × 10 × 6 ×
= 920 cm^3
idk
4:1 (divide both sides by 3)
