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Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x = 3 A. x = 2 B. x = -3 C. x = 3 D. x = 5 E. x = 4
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Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

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Page 1: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

BellringerWEDNESDAY SEPTEMBER 26, 2012

Simplify the expression below.

2x + x + 2 + 10 + 3x = 30

6x + 2 + 10 = 30

6x + 12 = 30 -12 -12

6x = 18

6 6x = 3

A. x = 2B. x = -3C. x = 3D. x = 5E. x = 4

Page 2: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Benchmark 3I can find the perimeter of

basic geometric objects using Algebraic Expressions.

2x

2x

Page 3: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Brief Review

What is perimeter?

Perimeter is the total distance around the

outside of a 2D shape.

You calculate it by adding together all the

lengths of a shape.

Page 4: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Example 1: WE DO

Find the perimeter of the figure below.8 cm

4 cm

8 + 8 + 4 + 4 = 24 cm

Page 5: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

example 2: WE DO

Find the perimeter of the figure below.

??

3

22

2

8+ 3 + 6 + 2 + 2 + 2 + 3 =

26 ft2

Page 6: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

example 3: YOU DO

Find the perimeter of the figure below.

2

332

2

7

2

3

7 + 2 + 2 + 3 + 2 + 3 + 3 + 2 =

24 ft

2

Page 7: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Sage-n-Scribe Activity

Using ONE pencil, you and your shoulder partner will complete the problems on your worksheet..

The sage will tell the scribe how to do problem 1 and the scribe will write down what his/her partner says, making corrections as necessary. Then switch roles.

Page 8: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Bellringerthursday september 27, 2012

Page 9: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

example 4: WE DOThe perimeter of this rectangle is 24

ft. What is the value of x?

2x

x

2x

x

2x + 2x + x + x = 24 6x = 24

6 6

x = 4

Page 10: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

example 5: YOU DOThe perimeter of this triangle is 18

cm. What is the value of x?

x + 2

6

x + 2

(x + 2) + (x + 2) + 6 = 18

2x + 2 + 2 + 6 = 18

2x + 10 = 18

-10 -10

2x = 8

2 2

x = 4

Page 11: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Example 6: WE DOA rectangle has a perimeter of 48 feet.

its width is double thE LENGTH. find the dimensions (length & width). DRAW A PICTURE TO GET YOURSELF

STARTED!

WIDTH

LENGTH

W = 2L W = 2L

L

L

2L + 2L + L + L = 486L = 48

6 6

LENGTH = 8WIDTH = 16

WIDTH = 2(L)WIDTH = 2(8)

Page 12: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Example 7: YOU DOA rectangle has a perimeter of 3o feet.

THE LENGTH IS 3 FEET LONGER THAN THE WIDTH. find the dimensions (length & width).

W W

L = W + 3

L = W + 3

(w + 3) + (w + 3) + w + w= 304w + 6 = 30

-6 -6

4w = 24

4 4w = 6

width = 6length = 9

LENGTH= W + 3

LENGTH= 6 + 3

Page 13: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Sage-n-Scribe Activity

Using ONE pencil, you and your shoulder partner will complete the problems on your worksheet..

The sage will tell the scribe how to do problem 1 and the scribe will write down what his/her partner says, making corrections as necessary. Then switch roles.

Page 14: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

HOMEWORK

NONE!

Page 15: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Exit SlipTake a notecard out of your table bin and write your name, class period, and exit slip solution on the card.

As you leave, please put it in the tray with your class period label.

Page 16: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Exit Slip (Side 1)The perimeter of this rectangle is 16

ft. What is the value of x?

3x

x

Page 17: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

Exit Slip (Side 2)Exit Slip (Side 2)Clarity of Lesson

Flip your notecard over to the other side.

Using a # from 1-5, write down the clarity of this lesson.

1 = “I don’t understand at all! HELP!”5 = “This is a piece of cake!!”

I am still confused about...I don’t get...

Page 18: Bellringer WEDNESDAY SEPTEMBER 26, 2012 Simplify the expression below. 2x + x + 2 + 10 + 3x = 30 6x + 2 + 10 = 30 6x + 12 = 30 -12 -12 6x = 18 6 6 x =

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