Warm-up:
1.How much paint would
the can hold?
4in
12in
2. How much metal did it
take to make the can?
Remember:
Surface Area = 2 × area of circle + area of rectangle
r
r
w
h
h
r
Remember:
Surface Area = 2 × area of circle + area of rectangle
Lateral “Label” Surface Area
=
area of rectangle
r
r
w
h
h
r
Remember:
Surface Area = 2 × area of circle + area of rectangle
Lateral “Label” Surface Area
Lateral “Label” Surface Area
=
=
area of rectangle
h
x
w
r
r
w
h
h
r
Remember:
Surface Area = 2 × area of circle + area of rectangle
Lateral “Label” Surface Area
Lateral “Label” Surface Area
Lateral “Label” Surface Area
=
area of rectangle
=
h
x
w
= h x circumference of circle
r
r
w
h
h
r
Remember:
Surface Area = 2 × area of circle + area of rectangle
Lateral “Label” Surface Area
Lateral “Label” Surface Area
Lateral “Label” Surface Area
Lateral “Label” Surface Area
=
area of rectangle
=
h
x
w
= h x circumference of circle
= h x
d
r
r
w
h
h
r
Try it!
Find the area of the label.
2in
5in
Red Bull
A painter is using a brush roller to make
even strokes on the wall. If the diameter of his
roller is 10cm and the length of the roller is 35cm,
how much paint will be applied
with one rotation of the roller?
February, 18 2010
Take out 7i and turn it into the black box.
You will need your calculator
Ruler and ½ sheet graph paper
We will take a practice test.
Finish Review for HW and +5 on your test.
Warm-up
Find the surface area.
10cm
3cm
4cm
Find the surface area.
2.6
3
5
5
2.6
5
3
2.6
3
Surface Area = 2 × area of circle + area of rectangle
r
r
w
h
h
r
Surface Area = 2 × area of circle + area of rectangle
SA = 2 x
r2
+ h x W
r
r
w
h
h
r
Surface Area = 2 × area of circle + area of rectangle
SA = 2 x
r2
+ h x w
SA = 2 x
r2
+ h x circumference of circle
r
r
w
h
h
r
Surface Area = 2 × area of circle + area of rectangle
SA = 2 x
r2
+ h x w
SA = 2 x
r2
+ h x circumference of circle
SA = 2 x
r2
+ h x
d
r
r
w
h
h
r
Try it!
Surface Area = 2 × area of circle + area of rectangle
3cm
3cm
w
5cm
5
3cm
Homework 3.3 Surface Area
Individual work!
Use your flip book, notes or
TAKS chart for help.
February 17, 2011
Have the homework out on your desk.
1. Graph the system of inequality:
y > 2x – 1
x - 2y < 8
2. Graph the inequality:
x + 13 < 8
or
- 8x< - 40
3. Graph the inequality:
-1 < - 4m < 16
February 17, 2011
Moodle enrollment key:
deaso6
Complete the Inequalities/Systems Quiz on
paper then key in your answers.
After the quiz, begin 7i homework.
~~Math writing~~
What is the difference between perimeter,
area and volume?
Write at least ¾ of a page and use
real-life examples in your explanation.
If the cylinder is filled 1 cm high with
water, what is the volume of the water in the
container?
How many layers
will it take to fill
the container?
4
12
What is the Volume
of the container?
Algebra Homework
Page 469
3 – 5 15 - 17
22 – 23 26 – 27
(10 problems)
th
8
Math
Bring your
netbook!
Math 8 Homework 1st period
st
1
period Page 373
1-4, 7, 19
Math 8 Homework 4th and 7th periods
Page 373
3, 4, 19, 21, 36
Algebra Homework 2-15-11
Page 409
17, 21, 37, 38
Page 462
5, 6, 7, 14, 25
Surface Area -• EX 2
Henrietta will paint the four walls and ceiling
of her room that is 9 feet wide and 14 feet
long with a 9 foot ceiling. How many
square feet has to be painted if she paints
the entire interior of the room?
th
8
Math
Susan is wrapping a
gift for her mom. She
purchased perfume
that came in a cube
box. The height of
the box is 4 inches.
How much wrapping
paper will she need
to cover the box
without any overlap?
Surface Area -• EX1
Jeremy wanted to make a wooden box with
height of 2 feet, width of 4 feet, and length
of 3 feet. How much wood is needed to
create the hollow box with a lid?
th
8
Math
David wants to
paint the sides and
the top of his
dresser. It is 4ft tall,
3 ft wide, and 2 ft
deep. How much
square footage will
he need to cover
with paint?
Surface Area -• EX 3
Honey Comb cereal is packaged in a
container like the one shown below. If the
dimensions of the box are 13 in by 9 in by
3 in, how much cardboard is needed to
construct one of the containers?
Surface Area -• EX 4
Suzanne’s mother bought her a pet gerbil.
She is keeping the pet in a box with a
length of 8 in, a width of 6in, and a height
of 5 in. She plans on covering the sides of
the box with contact paper. How many
square feet of contact paper is needed if
the top of the box is not covered?
Warm Up / Review 8th Math
Put the values on a number line.
56/6, 0.1, 86, 13/4, 14, 27/8
__________________________________
0
1
2
3
4
5
6
7
8
9
10
8th Math
After the Test
Page 140 1-12
Turn in to the black box
--Review-1. What is the location half way between point A and the y-axis?
2. Which point is located a distance of 7 units away from the x-axis?
3.
What
is the
location of
the point
half way
between
point C
and point
D?
A
4.
True of
false?
B
F
D
C
E
Point E is
located at
(-6, 0).
Algebra Warm-up
Solve and Graph:
1.
2.
X + 13 < 8 or -8x< -40
-1 < -4m < 16
Algebra Homework
Page 384 15, 17, 21 & 22 show all work!
Page 409 18, 20, 22
If you were absent yesterday also include:
Page 409 #s 4, 6, 8 (they are easy)