anonymous
  • anonymous
PQR is an isosceles triangle with PQ = QR. If mQPR = 40°, what is mPQR? 30° 40° 60° 80° 100°
Trigonometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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 :)
anonymous
  • anonymous
|dw:1433518361158:dw|
anonymous
  • anonymous
here is your triangle

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anonymous
  • anonymous
|dw:1433518423861:dw|
anonymous
  • anonymous
do you know what all angles add up to in a triangle?
anonymous
  • anonymous
180
anonymous
  • anonymous
so 40+40=80… 180-80=100
anonymous
  • anonymous
so angle mQPR=100

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