Hi,

The lower base angles of an isosceles trapezoid are labeled a and b. 

What is the size of the angles if a is equal to 5x + 3 and b is equal to 3x + 17

The base angles of an isosceles trapezoid are congruent(same)

  5x+3 = 3x+17 

   2x = 14

    x = 7,  5x + 3  = 38°    and 3x+17 = 38°  

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