Problem 22 of 7
Use opposite angles of parallelogram GHIJ to solve from angle G=3k+15 and angle I=90.
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apply angle theorem.
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Figure must be a parallelogram; opposite angles are congruent.
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Solution
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1. Identify the opposite angle pair.
2. Set their measures equal.
3. Solve for the missing measure or variable.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Setting consecutive angles equal unless extra conditions are given.