[scheduled:: 2025-01-13]

Polygon Area

Links and useful resources

• gr10's Geometry >>>START HERE<<<
• AoPS Alcumus
• Handwritten math converter
• Big Ideas Geometry textbook
• GeoGebra Online Geometry Constuction Tool
• Two-column math templates
• Proofs unit slides from mathgiraffe.com
• Proofs unit printables for two-column proofs

Lesson-specific resource links

• Youtube video for area of polygon

Concept summary and connections

• apothem
  • Apothem is distance from center of regular polygon to any edge
  • Area of regular polygon is $\frac{1}{2}p\cdot a$, where p is perimeter and a is apothem
• area of regular polygon
• area of irregular polygon
• tesselation
• decomposing a polygon
• apothem from side length of polygon

Worked examples

• Find the apothem of a regular hexagon with edge length 5
• Find the area of the hexagon
• Find the area of an irregular hexagon
• Find the area of a rectilinear polygon

Media resources

• Youtube search for "apothem"
• Youtube search for "area of regular polygon"
• Youtube search for "area of irregular polygon"
• Youtube search for "tesselation"
• Youtube search for "decomposing a polygon"
• Youtube search for "apothem from side length of polygon"

Guided practice

• Find apothem of regular polygon
• Decompose poly into easy shapes
• find area of regular poly

Homework

• #hw (geometry) 9.3 Polygon Area (p. 249) 2025-01-17