Can You Solve This 360° Quadrilateral Puzzle? | SAT Geometry Secrets Revealed

In this SAT geometry problem, we are given a quadrilateral where angle A is 45 degrees and the other three angles are marked as x. Since the sum of the interior angles of any quadrilateral is 360 degrees, we set up the equation: 45 + 3x = 360. By subtracting 45 from both sides, we get 315, and then dividing by 3, we find x equals 105 degrees. Therefore, the value of x is 105, and the final answer is Option D. Key tip: For any four-sided shape, remember that the total sum of the angles is always 360 degrees.
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