T?ng các góc trong m?t t? giác l?i b?ng: A. 7 20° B. 360° C. 180° 48 0° D.
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The sum of the interior angles of any quadrilateral is always equal to 360 degrees. Now, let's divide the quadrilateral into four triangles by drawing two diagonals. Each triangle will have one of the angles of the quadrilateral as its base angle. Since the sum Show more…
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