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30 Cards in this Set
- Front
- Back
9-1
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Two parallel lines lie in exactly one plane
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9-2
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In a plane if two lines are perpendicular to the same line, then they are parallel
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9-3
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Let L be a line and let P be a point not on L. Then there is at least one line through P, parallel to L
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9-4
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If two lines are cut by a transversal, and one pair of alternate interior angles are congruent, then the other pair of alternate interior angles are also congruent
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9-5
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Given two lines cut by a transversal. If a pair of alternate interior angles are congruent, then the lines are parallel
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9-6
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Given two lines cut by a transversal. If a pair of corresponding angles are congruent, then a pair of alternate interior angles are congruent
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9-7
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Given two lines cut by a transversal. If a pair of corresponding angles are congruent, then the lines are parallel
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9-8
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Given two lines cut by a transversal. If a pair of interior angles on the same side of the transversal are supplementary, the lines are parallel
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9-9
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If two parallel lines are cut by a transversal, each pair of corresponding angles are congruent
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9-10
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In a plane, if a line intersects one of two parallel lines in only one point, then it intersects the other
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9-11
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In a plane, if two lines are each parallel to a third line, then they are parallel to each other
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9-12
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In a plane, if a line is perpendicular to one of two parallel lines it is perpendicular to the other
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9-13
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For every triangle, the sum of the measures of the angles is 180
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9-14
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Each diagonal separates a parallelogram into two congruent triangles
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9-15
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In a parallelogram, any two opposite sides are congruent
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9-16
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In a parallelogram, any two opposite angles are congruent
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9-17
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In a parallelogram, any two consecutive angles are supplementary
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9-18
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The diagonals of a parallelogram bisect each other
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9-19
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Given a quadrilateral in which both pairs of oposite sides are congruent. Then the quadrilateral is a parallelogram
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9-20
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If two sides of a quadrilateral are parallel and congruent, then the quadrilateral is a parallelogram
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9-21
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If the diagonals of a quadrilateral bisect each other, then the quadrilateral is a parallelogram
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9-22
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The segment between the mid-points of two sides of a triangle is parallel to the third side and half as long
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9-23
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If a parallelogram has one right angle, then it has four right angles, and the parallelogram is a rectangle
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9-24
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In a rhombus, the diagonals are perpendicular to one another
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9-25
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If the diagonals of a quadrilateral bisect each other and are perpendicular, then the quadrilateral is a rhombus
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9-26
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The median to the hypotenuse of a right triangle is half as long as the hypotenuse
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9-27
30-60-90 Triangle Theorem |
If an acute angle of a right triangle has measure 30, then the opposite side is half as long as the hypotenuse
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9-28
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If one leg of a right triangle is half as long as the hypotenuse, then the opposite angle has measure 30
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9-29
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If three parallel lines intercept congruent segments on one transversal T, then they intercept congruent segments on every transversal T' which is parallel to T
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9-30
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If three parallel lines intercept congruent segments on one transversal, then they intercept congruent segments on any other transversal
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