alleryA parallelogram has one 90° corner. What is its most specific class, with side lengths unknown?
AIt is a square
BIt is a parallelogram
CIt is a rhombus
DIt is a rectangle
Answer & Solution
Correct answer: D. It is a rectangle
Adjacent supplementary angles to 90° are also 90°, and the opposite angle matches it. Thus all four angles are right and the figure is a rectangle.
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