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In parallelogram ABCD, angle A=x degrees and angle B=(2x-30) degrees. Find the value of x.?
I got 50 and its wrong. I dont know now! Please show work
3 Answers
- SidLv 68 years agoFavorite Answer
Pairs of opposite angles are equal in measure in a parallelogram, so
2x + 2(2x - 30) = 360
6x = 420
x = 70 degrees
- Anonymous8 years ago
parrallelogram is a 4 sided shape with 2 sets of sides of the same length
therefore can assume that angle A=Angle C and angle b=angle D
there is a total of 360 degrees in a parallelogram
so
x + x + (2x-30) + (2x-30) =360
6x-60=360
6x= 420
x=70 degrees
angle a and c = 70 degrees
angle b and d = 110 degrees
hope that is clear enough
