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3 cards from this section. Quick, good the night before a test.
Define a quadrilateral.
Think about the number of sides it has.
How many degrees are in the sum of a quadrilateral's interior angles?
Consider a triangle's angles also.
What is the sum of the interior angles of a quadrilateral?
Remember the total for a triangle is 180 degrees.
Is a square a type of rectangle?
Think about their definitions.
Determine whether a quadrilateral with angles 70°, 80°, 90°, and x° can exist. What is the value of x?
Remember, all angles need to sum to 360°.
If the corresponding angles of two quadrilaterals are equal, what can you conclude about them?
Think about the criteria for similarity.
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