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anonymous

  • one year ago

PQR is an isosceles triangle with PQ = QR. If mQPR = 40°, what is mPQR? 30° 40° 60° 80° 100°

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  1. anonymous
    • one year ago
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    For an isosoceles triangle, if two sides are the same length, then the two nonincluded angles are the same measure. A generic picture of that would be: |dw:1433438722021:dw| As in the two sides marked x are the same length and the angles marked \(\alpha\) are the same measure. Since that is true, see if you can piece together the measure of the angle you need :)

  2. anonymous
    • one year ago
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    |dw:1433518361158:dw|

  3. anonymous
    • one year ago
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    here is your triangle

  4. anonymous
    • one year ago
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    |dw:1433518423861:dw|

  5. anonymous
    • one year ago
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    do you know what all angles add up to in a triangle?

  6. anonymous
    • one year ago
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    180

  7. anonymous
    • one year ago
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    so 40+40=80… 180-80=100

  8. anonymous
    • one year ago
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    so angle mQPR=100

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