Final answer:
A concave hexagon is a hexagon with at least one interior angle greater than 180 degrees. To find the number of diagonals in a concave hexagon, use the formula (n * (n - 3)) / 2, where n is the number of sides of the polygon.
Step-by-step explanation:
A concave hexagon is a hexagon with at least one interior angle greater than 180 degrees. To draw a concave hexagon, start with a regular hexagon and then extend one of the sides inwards. This will create an interior angle greater than 180 degrees.
Now, let's find the number of diagonals in a concave hexagon.
A diagonal is a line segment that connects two non-adjacent vertices of a polygon. To find the number of diagonals in a concave hexagon, we can use the formula:
Number of diagonals = (n * (n - 3)) / 2
where n is the number of sides of the polygon. For a hexagon, n = 6. Plugging n = 6 into the formula, we get:
Number of diagonals = (6 * (6 - 3)) / 2 = 9 diagonals