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2 cards from this section. Quick, good the night before a test.
How many diagonals does a triangle have?
Remember a triangle has no non-adjacent vertices.
Calculate the number of diagonals in a square.
Use the formula with n = 4.
How many diagonals does a pentagon have?
Think about the formula for diagonals.
True or False: A triangle has diagonals.
Consider what defines a diagonal.
If a polygon has 12 sides, calculate the number of diagonals and describe the relationship between the number of sides and diagonals.
Remember the formula and notice the pattern in diagonal counts.
Explain how the diagonal formula could be extended to non-convex polygons and the considerations you would need to make.
Think about how non-adjacency applies in different polygon types.
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