Find the missing angle. Triangle has 2 angles. One 45 degrees and the other of 106 degrees. My choices are A) 84degrees B) 86 degrees C) 29° D) 82 degrees
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It a geometrical rule that the three angles in any triangle will have a sum of 180 degrees. In equation form: $\displaystyle \theta_1+\theta_2+\theta_3=180 $ Since you already know two of the angles, finding the third is simply algebra.
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