Final answer:
The sum of the interior angles of a 7-sided polygon, or a heptagon, is calculated using the formula (n - 2) × 180°. Plugging in 7 for n gives us 900°.
Step-by-step explanation:
The sum of the interior angles of any polygon can be found using the formula: (n - 2) × 180°, where n is the number of sides in the polygon. For a heptagon, a 7-sided polygon, we substitute n with 7 to find the sum of the interior angles.
So the calculation will be: (7 - 2) × 180° = 5 × 180° = 900°.
Therefore, the sum of the interior angles of a 7-sided polygon is 900 degrees.