Question

10
9
8
7
6
5
B
C
4
3
B
с
D.
D'
3
4
5
6.
7
8
9 10
A
D
-2 1-1
X
1-2
What is the length of BB'?
EP
70112 3141516171819

Answer 1

Answer:

22 length is the answer