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Lime

  • 3 years ago

Here we go again. Tired of these yet? Obtuse triangles. <DGF = 84°, then <DEF = ?° 42° 84° 48° none of these

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  1. Lime
    • 3 years ago
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  2. Lime
    • 3 years ago
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    The sum of interior angles in an obtuse triangle is 180°.

  3. Lime
    • 3 years ago
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    I'm pretty sure I have gotten this down. 180° - 84° = solution.

  4. campbell_st
    • 3 years ago
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    well the 2 curved arcs that make DGF also make DEF.. so I'd say the angles are equal... and in a kite those angles are equal...

  5. campbell_st
    • 3 years ago
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    oh and the triangle DGF is reflected in the line DF to form DEF...

  6. Lime
    • 3 years ago
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    With the answers provided, "none of the above" would be equal to 96°, yes?

  7. campbell_st
    • 3 years ago
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    the angles DEF and DGF are not supplementary... which is what you have done... they are congruent

  8. Lime
    • 3 years ago
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    \[\angle DGF ≅ \angle DEF \] by ASA method?

  9. campbell_st
    • 3 years ago
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    but I don't think you need to prove congruency... just recognise the equal angle markings..

  10. Lime
    • 3 years ago
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    84° is equal to 84°.

  11. campbell_st
    • 3 years ago
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    correct

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