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Understanding Equivalent Fractions with Congruent Figures | 3rd Grade Math

Khan AcademyJuly 1, 20252 min585 views
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Understanding Congruent Figures

  • 💡 Congruent figures are defined as identical in every way, possessing the same side lengths and angles.
  • 🎯 The video emphasizes that congruent figures have the same total area.

Shaded Parts and Fractions

  • 📌 In Figure A, one out of three equal sections is shaded, representing 1/3 of the total area.
  • 🧩 Similarly, Figure B is divided into three equal sections, with one shaded, also representing 1/3 of the total area.

Comparing Shaded Areas

  • 📊 Statement one suggests the shaded area of Figure A is less than Figure B, which is incorrect because the figures are congruent.
  • ⚠️ Statement two suggests the shaded area of Figure A is greater than Figure B, which is also incorrect.
  • ✅ The true statement is that the area of the shaded part of Figure A is equal to the area of the shaded part of Figure B.
  • 🔑 This equality holds because both figures are congruent, meaning their total areas are the same, and thus one-third of each area is also the same.
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Transcript10 segments

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What’s Discussed

Congruent FiguresEquivalent FractionsAreaFractions3rd Grade MathKhan AcademyUnit FractionsGeometric Figures
Smart Objects7 · 6 links
Concepts· 4
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