1. The problem asks us to identify the polygon shown as an arrow pointing upward and find the sum of the measures of its interior angles. 2. To identify the polygon, count the number of sides it has. An arrow shape typically consists of 7 sides. 3. The formula to find the sum of the interior angles of a polygon with $n$ sides is: $$\text{Sum of interior angles} = (n - 2) \times 180$$ 4. Substitute $n = 7$ into the formula: $$ (7 - 2) \times 180 = 5 \times 180 = 900 $$ 5. Therefore, the polygon is a heptagon (7-sided polygon), and the sum of the measures of its interior angles is $900$ degrees. 6. In summary: - Polygon: Heptagon - Sum of interior angles: $900$°