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To calculate the total of the interior angles of a heptagon (7-sided polygon), we use the given formula:

\[
T = 180^\circ \times (n - 2)
\]

where \( T \) is the total sum of the interior angles, and \( n \) is the number of sides of the polygon. For a heptagon, \( n = 7 \). 

Substitute \( n = 7 \) into the formula:

\[
T = 180^\circ \times (7 - 2)
\]
\[
T = 180^\circ \times 5
\]
\[
T = 900^\circ
\]

Thus, the total sum of the interior angles of the heptagon is **900°**.

Would you like more details or have any questions?

Here are 5 related questions for further practice:
1. What is the sum of the interior angles of a hexagon (6-sided polygon)?
2. How do you calculate the measure of one interior angle in a regular polygon?
3. What is the total of the exterior angles of any polygon?
4. What is the relationship between the number of sides of a polygon and its interior angles?
5. How do the interior and exterior angles of a polygon add up at each vertex?

**Tip:** The sum of the exterior angles of any polygon is always 360°, regardless of the number of sides!

Calculate the total of the interior angles of this heptagon.

Learn how to calculate the total interior angles of a heptagon (7-sided polygon) using the formula T = 180° × (n - 2). This problem explains the steps and concepts behind calculating the interior angles of polygons, suitable for students in Grades 6-8.

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