geometry: chapter 5 Flashcards

0
Q

Parallelogram

A

A quadrilateral with both pairs of opposite sides parallel

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1
Q

Quadrilateral

A

A four sided polygon

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2
Q

Theorem 5-1

A

Opposite sides of a parallelogram are congruent

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3
Q

Theorem 5-2

A

Opposite angles of a parallelogram are congruent

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4
Q

Theorem 5-3

A

Diagnose of a parallelogram bisect each other

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5
Q

Theorem 5-4

A

If both pairs of opposite sides of a quadrilateral are congruent then the quadrilateral is a parallelogram

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6
Q

Theorem 5-5

A

If one pair of opposite sides of a quadrilateral are both congruent and parallel than the quadrilateral is a parallelogram

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7
Q

Theorem 5-6

A

If both pairs of opposite sides of a quadrilateral are congruent than the quadrilateral is a parallelogram

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8
Q

Theorem 5-7

A

If the diagonals of a quadrilateral bisect each other than the quadrilateral is a parallelogram

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9
Q

Five ways to prove that a quadrilateral is a parallelogram

A

show that both pairs of opposite sides are parallel
Show that both pairs of opposite sides are congruent
Show that one pair of opposite sides are both congruent and parallel
Show that both pairs of opposite angles are congruent
Show that the diagonals bisect each other

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10
Q

Theorem 5-8

A

If two lines are parallel then all points on one line are equidistant from the other one

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11
Q

Theorem 5-9

A

If three parallel lines cut off congruent segments on one transversal then they cut off congruent segments on every transversal

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12
Q

Theorem 5-10

A

A line that contains the midpoint of one side of a triangle and is parallel to another side passes through the midpoint of the third side

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13
Q

Theorem 5-11

A

The segment that joins the midpoint of two sides of a triangle is
Parallel to the third side
Half as long is the third

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14
Q

Rectangle

A

A quadrilateral with four right angles

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15
Q

Rhombus

A

Quadrilateral with four congruent sides

16
Q

Square

A

A quadrilateral with four right angles and four congruence

17
Q

Theorem 5-12

A

The diagonals of a rectangle are congruent

18
Q

Theorem 5-13

A

The diagonals of around this are perpendicular

19
Q

Theorem 5-14

A

Each diagonal of a rhombus bisects two angles of the rhombus

20
Q

Theorem 5-15

A

The midpoint of the hypotenuse of a right triangle is equidistant from three vertices

21
Q

Theorem 5-16

A

if an angle of the parallelogram is a right angle then the parallelogram is a rectangle

22
Q

Theorem 5-17

A

If two consecutive sides of a parallelogram are congruent then parallelogram is a rhombus

23
Q

Trapezoid

A

Why gelato with exactly one pair of parallel sides

24
Q

Bases

A

The parallel sides of the trapezoid

25
Q

Legs

A

The other side of the trapezoid

26
Q

Isosceles trapezoid

A

A trapezoid with congruent legs

27
Q

Theorem 5-18

A

Base angles of an isosceles trapezoid are congruent

28
Q

Median of a trapezoid

A

Segment that joins the midpoint of the legs

29
Q

Theorem 5-19

A

Median of a trapezoid
Is parallel to the bases
Has a length equal to the average of the base lengths