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Today's question of the day is from the geometry category. Click on an answer choice and then click on 'submit answer' to see if you got it right!

Two parallel lines A B and C D are intersected by a 3rd line. The upper right angle of C D and the 3rd line is 80 degrees. A 4th line divides the lower left corner of A B and the 3rd line. The two corners are x and 3x degrees.

Lines AB and CD are parallel. What is the value of x?

  Answer A   10
Answer B 15
Answer C 20
Answer D 25
Answer E 30

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