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The wings of an SR-71 Blackbird aircraft suggest congruent triangles. What is ∆D


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The Wings Of An SR71 Blackbird Aircraft Suggest Congruent Triangles What Is Dplease Po Pasagot Ng Maayos class=

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Domaumaruchan69viz

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  • ∠D = 75°

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SOLUTION:

Since ∆ABC ≅ ∆DEF, then:

  • m∠B and m∠E = 30°
  • m∠C and ∠F = 75°

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Therefore,

  • m∠D = 180° – (m∠E + m∠F)
  • m∠D = 180° – (30° + 75°)
  • m∠D = 180° – 105°
  • m∠D = 75°

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