Custom Size 20-sided Dice : 8 Steps (with Pictures) - Instructables - Free Printable

Explanation:
This is a net of a cube. A cube has 6 faces, and when folded, opposite faces do not share an edge. In a cube net, opposite faces are always separated by one face when you look at the net.

We need to find which numbers are on opposite faces. Let's look at the net and find pairs that are opposite.

Step 1: Identify the center face.
In this net, face 1 is in the middle of the orange section. It is surrounded by faces 7, 19, 13, and 15. That means 1 is adjacent to these four.

Step 2: Find the face opposite to 1.
The only face not adjacent to 1 is face 10. So, 1 and 10 are opposite.

Step 3: Find the face opposite to 19.
Face 19 is adjacent to 1, 6, 10, and 3. The face not adjacent to 19 is face 14. So, 19 and 14 are opposite.

Step 4: Find the face opposite to 13.
Face 13 is adjacent to 1, 9, 5, and 15. The face not adjacent to 13 is face 8. So, 13 and 8 are opposite.

Now we have three pairs:
- 1 ↔ 10
- 19 ↔ 14
- 13 ↔ 8

We need to find the sum of the numbers on the opposite faces.
Add the numbers in each pair:
1 + 10 = 11
19 + 14 = 33
13 + 8 = 21

Now add all three sums:
11 + 33 + 21 = 65

Final Answer: 65