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Polygon Exterior Angles

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Polygon Exterior Angles worksheet preview

Polygon Exterior Angles

Polygon with exterior angles marked

🎯 WALT: We Are Learning To understand exterior angles of polygons

Success Criteria: I can identify exterior angles, calculate missing angles, and explain why the sum is always 360°

1. What is the sum of exterior angles for ANY polygon?

180°

360°

540°

It depends on the number of sides

2. In a regular pentagon, what is each exterior angle?

36°

72°

108°

120°

3. A quadrilateral has exterior angles of 95°, 85°, and 90°. What is the fourth exterior angle?

Answer: _______°

4. Which statements about exterior angles are true? (Tick all that apply)

An exterior angle and its adjacent interior angle sum to 180°

Exterior angles are always acute

The sum of exterior angles equals 360° for any polygon

Regular polygons have equal exterior angles

✏️ Problem Solving & Reasoning

5. A regular octagon has how many degrees in each exterior angle? Show your working.
6. An irregular hexagon has five exterior angles: 45°, 72°, 83°, 61°, and 55°. Find the sixth exterior angle.
7. Explain in your own words why the sum of exterior angles is always 360° for any polygon.
8. Extension Challenge: If a regular polygon has exterior angles of 24°, how many sides does it have? What type of polygon is this?

Number of sides: _______ Type of polygon: _____________

🌟 Investigation Activity

9. Drawing Challenge: Draw any irregular quadrilateral below. Mark and label all four exterior angles. Verify that they sum to 360°.
10. Extension: Research and explain the relationship between the number of sides (n) and each exterior angle in a regular polygon. Write a formula.

Formula: Each exterior angle = _____________

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