Answer:
x=26
Explanation:
fdg is a 90 degree angle. 3x+12 3x26=78 78 plus 12 equals 90
If EFGH is a rhombus, then the diagonals are perpendicular. Therefore m∠FDG = 90°.
Therefore we have the equation:
3x + 12 = 90 subtract 12 from both sides
3x = 78 divide both sides by 3
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