Why same areas? (3)

Topic:Area

ABCD is a rectangle, and ABE, BDF, DCH, CAG are equilateral triangles. Why are the areas of the different colors the same? (Hint: Try to resize ABCD to see anything is keeping unchanged)

New Resources

Squaring a Rectangle (PST Version)
繪畫垂直線
Perpendicular Lines: Quick Exploration
Angle Addition Postulate (V2) - Integer Solutions
Basic and Compound Inequality Illustrator

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Example 3
Inequalities: graphic resolution
Horse on a Farm
Sample Sizes to Estimate a Population Proportion
operasi himpunan

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Scatter Plot
Secant Line or Secant
Continuity
Diagrams
Plane Figures or Shapes