Questions and Answers
Which shapes have 2 pairs of opposite sides that are parallel?
Which shapes have at least 1 pair of opposite sides that are parallel?
Which shapes have 2 pairs of opposite sides that are congruent?
Which shapes have 2 pairs of adjacent sides that are congruent?
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What shape has exactly 1 pair of congruent sides?
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Which shapes have all sides congruent?
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Which shapes have opposite angles that are congruent?
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What shape has exactly one pair of congruent angles?
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Which shapes have all angles equal to 90 degrees?
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Which shapes have both diagonals bisecting each other?
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What shapes have congruent diagonals?
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Which shapes have diagonals that are perpendicular?
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What shape has one diagonal that is bisected?
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Which shapes have diagonals that bisect both pairs of opposite angles?
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What shape has one diagonal that bisects opposite angles?
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Which shapes have consecutive angles that are supplementary?
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Study Notes
Key Properties of Quadrilaterals
- Parallelograms feature 2 pairs of opposite sides that are parallel, contributing to their unique properties.
- Trapezoids have at least 1 pair of opposite sides that are parallel, distinguishing them from other quadrilaterals.
- Congruent Sides are a hallmark of many quadrilaterals: both pairs of opposite sides in parallelograms, rectangles, rhombuses, and squares are congruent.
- Adjacent Side Congruence is characteristic of rhombuses, squares, and kites, where 2 pairs of adjacent sides are equal.
Specific Quadrilateral Types
- Isosceles Trapezoids are defined by having exactly 1 pair of congruent sides, which is a key identifying feature.
- All Sides Congruent quadrilaterals include rhombuses and squares, with kites occasionally falling into this category.
Angle Properties and Relationships
- Opposite Angles are congruent in parallelograms, rectangles, rhombuses, and squares, showing symmetry in their structure.
- Kites are unique as they have exactly one pair of congruent angles, setting them apart from other quadrilaterals.
- Right Angles are exclusive to rectangles and squares, both of which have all angles measuring 90 degrees.
Diagonal Characteristics
- Diagonal Bisection occurs in parallelograms, rectangles, rhombuses, and squares, ensuring that diagonals divide each other equally.
- Congruent Diagonals can be found in rectangles, squares, and isosceles trapezoids, indicating regularity in shape.
- Perpendicular Diagonals are a notable trait of rhombuses, squares, and kites, often creating distinct angle relationships.
Additional Diagonal Properties
- Kites feature one diagonal that bisects the other.
- Rhombuses and Squares have diagonals that bisect both pairs of opposite angles, illustrating their symmetry and balance.
Angle Relations
- Supplementary Angles are a characteristic of parallelograms, rectangles, rhombuses, squares, trapezoids, isosceles trapezoids, and sometimes kites, ensuring that adjacent angles sum to 180 degrees.
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Explore the essential properties of quadrilaterals through interactive flashcards. Each card highlights different characteristics such as parallel sides and congruent angles, including examples like parallelograms and trapezoids. Perfect for reinforcing geometry vocabulary and understanding shapes.