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It’s a quadrilateral parallelogram. Solve for x
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8 votes
It’s a quadrilateral parallelogram. Solve for x

It’s a quadrilateral parallelogram. Solve for x-example-1
User Noisesmith
by
7.5k points

1 Answer

9 votes
4 sided shapes have internal angles that MUST add up to 360 degrees, so add all four angles to get 360 (opposite angles are equal) so:
8x + 19 + 8x + 19 + 21x - 13 + 21x - 13 = 360
Collect like terms so
58x + 12 = 360
58x = 348
x = 6
User RaedMarji
by
8.3k points
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