SOLUTION: If m∠A = 65°, m∠B = 115°, and m∠C = (2x + 5)°, determine the value of x so that Real-life picture is a parallelogram.

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Question 1101822: If m∠A = 65°, m∠B = 115°, and m∠C = (2x + 5)°, determine the value of x so that Real-life picture is a parallelogram.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
You also need one more angle, since you have a parallelogram.

Any pair of angles on one side of the figure must sum to 180 degrees.

65%2B115=180, degrees


Either system%282x%2B5=65%2COR%2C2x%2B5=115%29.

Either angle at C is 65 degree or angle at C is 115 degree;
but not both.