Answer: 1080
Step-by-step explanation:
1 Find the number of sides using the formula: 360°/exterior angle = number of sides
2 Substitute the exterior angle (45°) into the formula: 360°/45° = 8 sides
3 Use the formula for the sum of interior angles: (n-2) * 180° where n is the number of sides
4 Substitute the number of sides (8) into the formula: (8-2) * 180° = 6 * 180° = 1080°
