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Mathematics 9 Online
OpenStudy (anonymous):

Quadrilateral DEFG is a rectangle. If the measure of Angle EDF = 5x-3 and the measure of Angle DFG = 3x+7, find the measure of Angle EDF. a. 20 b. 22 c. 18

OpenStudy (anonymous):

OpenStudy (anonymous):

5x - 3 + 3x + 7 = 90 combines like terms, then isolate x

OpenStudy (anonymous):

20?

OpenStudy (anonymous):

EDF and DFG are equal. Set 5x-3 = 3x+7. 2x = 10 x=5 Plug x back into the equation for EDF 5(5)-3 = 25-3 = 22 (B)

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