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GeoGebraClasse GeoGebra

Exploring Congruent Complements

Move point C around (but keep it somewhere between points D and B), then answer the questions below.

What kind of angles are ∠DAC and ∠CAB?

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  • A
  • B
  • C
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What kind of angles are ∠EAB and ∠CAB?

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  • A
  • B
  • C
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Regardless of where you move point C, what do you notice about angles ∠EAB and ∠DAC?