All High School Math Resources
Example Question #1 : Parallelograms
In the parallellogram, what is the value of ?
Opposite angles are equal, and adjacent angles must sum to 180.
Therefore, we can set up an equation to solve for z:
(z – 15) + 2z = 180
3z - 15 = 180
3z = 196
z = 65
Now solve for x:
2z = x = 130°
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