Questions and Answers
Is a square a rhombus?
False
Do the diagonals of a parallelogram bisect the angles of the parallelogram?
False
Is a quadrilateral with one pair of sides congruent and one pair of sides parallel a parallelogram?
False
Are the diagonals of a rhombus congruent?
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Does a rectangle have consecutive congruent sides?
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Does a rectangle have perpendicular diagonals?
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Do the diagonals of a rhombus bisect each other?
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Are the diagonals of a parallelogram perpendicular bisectors of each other?
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Do perpendicular lines lie in the same plane?
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Are two lines perpendicular if and only if they form congruent adjacent angles?
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If a pair of vertical angles are supplementary, then the lines forming the angles are perpendicular?
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If there are two points, then there exists exactly one line?
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Is a right triangle also equilateral?
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If a triangle has an obtuse angle, then its orthocenter is outside the triangle?
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In a rectangle, are the perpendicular bisectors of the two diagonals perpendicular?
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If an equilateral triangle shares two sides with a parallelogram, then it is a rhombus?
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Is the base of an isosceles triangle greater than the sum of its two legs?
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Is the exterior angle of a regular polygon less than an interior angle?
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If two angles are supplementary to the same angle, then they are supplementary to each other?
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If parallel lines are cut by a transversal, then alternate interior angles are not congruent?
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Passing through a point not on line l, there exists exactly one line perpendicular to line l?
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Passing through a point not on line l, there exists exactly one line parallel to line l?
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Is the converse of a theorem true?
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Can a theorem be proven?
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Are two intersecting lines coplanar?
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Do supplementary angles form a linear pair?
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If line 1 is in plane X and line 2 is in plane Y and plane X is parallel to plane Y, then line 1 is parallel to line 2?
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If points M and N are on line PQ and line PM is congruent to line NQ, then line PN is congruent to line MQ?
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Is a rhombus a square?
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Is a parallelogram a rectangle?
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Is a rectangle a parallelogram?
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Is a trapezoid a quadrilateral?
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Is a quadrilateral a trapezoid?
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Study Notes
Always Statements
- A square is classified as a rhombus, indicating all squares meet the properties of rhombuses.
- Perpendicular lines exist within the same plane, establishing a consistent geometric relationship.
- Two lines are defined as perpendicular if they form congruent adjacent angles, a key property in triangle and angle relationships.
- There is exactly one line perpendicular to a given line, passing through any external point, reinforcing concepts of parallel and perpendicular lines.
- A theorem has a definitive proof, demonstrating its validity within the mathematical framework.
- Two intersecting lines are always coplanar, confirming that they reside in the same plane.
- If points M and N are located on line PQ, and line segments PM and NQ are congruent, then line segments PN and MQ must also be congruent.
Sometimes Statements
- The diagonals of a parallelogram may bisect the angles, but this is not universally true for all parallelograms.
- A quadrilateral with one pair of congruent sides and one pair of parallel sides is sometimes classified as a parallelogram based on additional properties.
- The diagonals of a rhombus are sometimes congruent, not a defining characteristic of all rhombuses.
- A rectangle can have consecutive congruent sides, but not all rectangles will exhibit this property.
- The diagonals of a parallelogram being perpendicular bisectors is conditional and not an absolute truth.
- The exterior angle of a regular polygon can sometimes be less than the interior angle, depending on the configuration of the polygon.
- If two angles are supplementary to the same angle, they may or may not be supplementary to each other, depending on the specific angles involved.
- The converse of a theorem may occasionally hold true, but it is not guaranteed for all theorems.
- A rhombus can be a square, but not all rhombuses fulfill the additional criteria necessary for squareness.
- A parallelogram may also be a rectangle, depending on the angles being right angles.
- Supplementary angles can form a linear pair, but this is not a requirement for all supplementary angle pairs.
Never Statements
- A right triangle can never be equilateral, as equilateral triangles have all sides equal and angles of 60 degrees.
- The base of an isosceles triangle is never greater than the sum of its two legs, consistent with triangle inequality principles.
- If parallel lines are intersected by a transversal, the alternate interior angles will always be congruent, so they cannot be non-congruent.
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Description
Test your understanding of key geometric properties with this 'Always/Sometimes/Never' flashcard quiz. Determine the truth of various statements related to geometry, including properties of squares, parallelograms, and rhombuses. Perfect for sharpening your knowledge and critical thinking skills in geometry.
