1. The problem asks for the sum of the interior angles of a polygon with 7 sides (a heptagon). 2. The formula to find the sum of interior angles of any polygon with $n$ sides is: $$\text{Sum of interior angles} = (n - 2) \times 180$$ 3. Here, $n = 7$ because the polygon is a heptagon. 4. Substitute $n = 7$ into the formula: $$\text{Sum} = (7 - 2) \times 180 = 5 \times 180$$ 5. Calculate the product: $$5 \times 180 = 900$$ 6. Therefore, the sum of the interior angles of a heptagon is $900$ degrees. This means if you add up all the interior angles inside the seven-sided polygon, the total will be $900$ degrees.