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ANSWERS TO WORKSHEET. 1) True 2) False 3) True 4) True x = 20, y = 10 6) x = 5 y = 3 7) 15 8) 27 9) 6 10) 2a 11) 84 12) 70 13) 72 14) 7 15) 16 16) 6 17) 2. 5-4 Special Parallelograms. TEST DATE IS CHANGED!!!!!! Moved early to THURSDAY DEC. 1 QUIZ is TUESDAY Nov. 29. Rectangle.

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answers to worksheet
ANSWERS TO WORKSHEET

1) True 2) False 3) True 4) True

  • x = 20, y = 10 6) x = 5 y = 3 7) 15

8) 27 9) 6 10) 2a 11) 84

12) 70 13) 72 14) 7 15) 16

16) 6 17) 2

5 4 special parallelograms

5-4 Special Parallelograms

TEST DATE IS CHANGED!!!!!!

Moved early to THURSDAY DEC. 1

QUIZ is TUESDAY Nov. 29

rectangle
Rectangle
  • A quadrilateral with four right angles
  • Theorem: If one angle of a parallelogram is 90º, then it is a rectangle.
rectangle1
Rectangle
  • Theorem: The diagonals of a rectangle are congruent.
  • Theorem: The midpoint of the hypotenuse of a right triangle is equidistant from the three vertices.

A

B

O

D

C

A

OR

The median of a right angle of a triangle is ½ the hypotenuse

O

D

C

rhombus
Rhombus
  • A quadrilateral with four congruent sides.
  • Theorem: If two consecutive sides of a parallelogram are congruent, then it is a rhombus.
rhombus1
Rhombus
  • The diagonals of a rhombus are perpendicular.
  • Each diagonal of a rhombus bisects two angles.
square
Square
  • A quadrilateral with four right angles and four congruent sides. It’s a combo of a rectangle and a rhombus!!!!
  • ALL THEOREMS for a RECTANGLE and RHOMBUS also apply to a square.
multiple choice notes
Multiple Choice Notes

1) A conditional statement is shown below. If a quadrilateral has perpendicular diagonals,

then it is a rhombus.

Which of the following is a counterexample to the statement above?

A) Look at C)

B) your pictures

in Notes!! D)

Answer: A

multiple choice notes1
Multiple Choice Notes

Quadrilateral is a parallelogram. If adjacent angles are congruent, which statement must be true?

A) Quadrilateral is a square.

B) Quadrilateral is a rhombus.

C) Quadrilateral is a rectangle.

D) Quadrilateral is an isosceles trapezoid.

ANSWER: C

too abcd is a rhombus
TOO: ABCD is a Rhombus
  • Find the measure of angles 1, 2, 3, and 4.

A

B

4

E

2

62º

3

1

D

C

too mnop is a rectangle
TOO: MNOP is a Rectangle
  • Find the measure of angles 1, 2, and 3.
  • Find the length of PQ and MO.

M

N

2

29º

3

12

Q

1

P

O

homework
Homework
  • Page 187 #1-29,
  • SKIP 20-23
    • #28 is 4 steps
    • #29 is 6 steps
    • Copy the chart for #1-10
  • Flashcards
    • Rectangle
    • Right Triangle Thm
    • Rhombus
    • Square
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