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Gabylovesyou Group Title

What statement is needed to prove that ΔABC is similar to ΔDBA? Segment BC is a hypotenuse. Angle B is congruent to itself. Segment BA is shorter than segment BC. Segment BC is intersected by segment AD.

  • 7 months ago
  • 7 months ago

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  1. Gabylovesyou Group Title
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    • 7 months ago
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  2. Gabylovesyou Group Title
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    @phi i think its D

    • 7 months ago
  3. phi Group Title
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    this problem looks like it has a typo. we need to know the smaller triangle has a right angle. Segment BC is intersected by segment AD. is not enough we need to know BC is perpendicular to AD.

    • 7 months ago
  4. Gabylovesyou Group Title
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    whats hypotenuse ?

    • 7 months ago
  5. phi Group Title
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    hypotenuse is the longest side of a right triangle. telling us BC is a hypotenuse is not new info because they tell us angle CAB (marked with the little box) is a right angle, which makes BC a hypotenuse if (but the did not) tell us AB was a hypotenuse, we could use that ...

    • 7 months ago
  6. Gabylovesyou Group Title
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    so is the answer B ?

    • 7 months ago
  7. phi Group Title
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    no. I think there is a problem with this question. None of the choices allow us to prove the triangles are similar.

    • 7 months ago
  8. Gabylovesyou Group Title
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    in order to solve it you dont need any of those statements AT ALL ?

    • 7 months ago
  9. phi Group Title
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    we do need to know that angle ADB = 90º we would know that if they told us 1) angle ADB is a right angle, or 2) side AB is a hypotenuse, or 3) AD is perpendicular to BC but they did not... so there is a problem with this question. Ask your teacher about it.

    • 7 months ago
  10. Gabylovesyou Group Title
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    hmmm ok

    • 7 months ago
  11. phi Group Title
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    to make it more clear. the big triangle ABC has a right angle in it (we know because they mark angle BAC with a little square) if we draw the little triangle like this |dw:1396302963812:dw|

    • 7 months ago
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spraguer (Moderator)
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