Page 90 - NUMINO Challenge_C2
P. 90
Basic Concepts Number of Shortest Paths in 3-D Shapes
The number of shortest paths on a cube from A to B can be found by
adding the number of paths to each vertex.
B 2 B 6
2 B
1 2
1
A1 A A
Example Two cubes are joined together as shown below. Find the number
of shortest paths the ant can take from point A to point B.
B
A
Class Notes
The points that have one or two shortest paths are marked in the diagram below. Fill in
the blanks with the number of shortest paths from A to that vertex.
2 B
2
1
12
A
11
Therefore, the number of shortest paths the ant can take from point A to point B is
.
87Number of Outcomes
The number of shortest paths on a cube from A to B can be found by
adding the number of paths to each vertex.
B 2 B 6
2 B
1 2
1
A1 A A
Example Two cubes are joined together as shown below. Find the number
of shortest paths the ant can take from point A to point B.
B
A
Class Notes
The points that have one or two shortest paths are marked in the diagram below. Fill in
the blanks with the number of shortest paths from A to that vertex.
2 B
2
1
12
A
11
Therefore, the number of shortest paths the ant can take from point A to point B is
.
87Number of Outcomes
