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It depends on how the trapezoid is formed. A trapezoid can have either 2 right angles, or no right angles at all.
What is a Trapezoid? Information & Fun Facts
Trapezoid tables.
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Illustrative Mathematics
Right angles in shapes (informal definition) (article)
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A trapezoid has two 65-degree angles, and also 8-inch and 12-inch
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How many acute angles does a trapezoid have?
Chapter 9 2D 實體結構分析Analysis of 2D Structural Solids. - ppt
What is a Trapezoid? Information & Fun Facts
