form 1 -polygon

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FORM 1 CHAPTER 10 – POLYGON I - Has straight lines - Regular - No curves - Irregular - Closed shape Names of Polygons Regular Polygon Name Sides Shape Interior Angle Triangle 3 60° Quadrilateral 4 90° Pentagon 5 108° Hexagon 6 120° Heptagon 7 128.571° Octagon 8 135° Nonagon ) 9 140° Decagon 10 144° Hendecagon 11 147.273° Dodecagon 12 150° Types of POLYGON What is POLYGON?

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Page 1: FORM 1 -POLYGON

FORM 1

CHAPTER 10 – POLYGON I

- Has straight lines - Regular

- No curves - Irregular

- Closed shape

Names of Polygons

    Regular Polygon

Name Sides Shape Interior Angle

Triangle 3 60°

Quadrilateral 4 90°

Pentagon 5 108°

Hexagon 6 120°

Heptagon  7 128.571°

Octagon 8 135°

Nonagon ) 9 140°

Decagon 10 144°

Hendecagon  11 147.273°

Dodecagon 12 150°

n-gon n (n-2) × 180° / n

Types of POLYGONWhat is POLYGON?