math
posted by 666name999
check my answers pls
1. which solid has two bases that are triangles and three lateral surfaces that are rectangles
a. triangular pyramid
b. rectangular prism
c. triangular prism ***
d. rectangular pyramid
2. a solid with two parallel and congruent bases cannot be which of the following
a. cylinder
b. cube
c. prism
d. pyramid ***
3. which of the following are considered skew lines
a. ab and ae
b. ab and ce ****
c. bc and ce
d. bc and de
4. what is the base plan for the set of stacked cubes
a. 1, 1, 1, 2, 3 ***
b. 1, 3, 2, 1, 1,
c. 1, 1, 1, 1, 1,
d. 1, 1, 1, 3, 2
5. which of the following is the front view for the model
a.
b.
c. ***
d.
6.which solid does the net form
a. hexagonal prism
b. hexagonal pyramid ***
c. rectangular prism
d. rectangular pyramid
7.which solid does this net form
a. square pyramid ***
b. triangular prism
c. triangular pyramid
d. cube
8. what is the surface area of the given figure
12 cm, 16 cm, 32 cm, 20 cm
a. 1,008cm^2
2. 1,728cm^2
3. 1,392cm^2
4. 1,216cm^2 ***
9. use the net to find the approximate surface area of the cylinder to the nearest square meter
a. 440 m^2
b. 314 m^2
c. 283 m^2***
d. 214 m^2
10. what is the volume of the prism to the nearest whole unit?
12 in, 8 in, 4 in,
a. 384 in^3***
b. 352 in^3
c. 160in^3
d. 24in^3
11. what is the volume of the triangular prism to the nearest whole unit?
2 ft, 12 ft, 18 ft
a. 864ft^3
b, 432ft^3***
c.216 ft^3
d. 492ft^3
12. what is the volume of the cone to the nearest whole unit
13 in, 8 in
a. 871 in^3
b. 1,307in^3
c. 1,416 in^3 ***
d. 2,614 in^3
13. what is the volume of the pyramid to the nearest whole unit
9 yd, 14 yd, 9 yd
a. 1,134 yd^3 ***
b. 567 yd^3
c. 378 yd^3
d. 284 yd^3
14. what is the slant height for the given pyramid to the nearest whole unit?
pyramid base = 10 cm
height = 12 cm
a. 7 cm
b. 11 cm ***
c. 13 cm
d. 16 cm
15. what is the length of the diagonal for the given rectangular prism to the nearest whole unit
length = 6 cm
width = 5 cm
height = 9 cm
a. 8 cm
b. 10 cm
c. 11 cm
d. 12 cm ***
16. the cones below are similar, although not drawn to scale
1. 15 ft r = 5 ft
2. 18 ft x
what is the length of the radius of the larger cone?
a. 5 ft ***
b. 6 ft
c. 7 ft
d. 8 ft
17. a cone has the radius of 24cm and a volume of 1,920cm^3. what is the volume of a similar cone with a radius of 18cm?
a. 480cm^3
b. 810 cm^3
c. 1,080 cm^3 ***
d. 1,440 cm^3
18. what is the surface area of a sphere with a radius of 5 meters rounded to the nearest square meter?
a. 250 m^2 ***
b. 314 m^2
c. 340m^2
d. 423m^2
19. what is the volume of a sphere with a radius of 4 meters rounded to the nearest square meter?
a. 67 m^3
b. 201 m^3
c. 268m^3 ***
d. 804m^3

Reiny
#1, #2 are correct
#3  #9 need a look at the diagrams, which of course we can't post here
#10  #12 look good
#13  need diagram, can't tell which numbers go where
#14  need diagram
#15 , I guessed what you meant, looks ok
#16
18/15 = x/5
15x = 90
x = 6
#17
volumes of similar objects are proportional to the cube of their corresponding sides
x/1920 = 18^3/24^3 = (3/4)^3 = 27/64
64x = 27(1920)
x = 27(1920)/64 = 810
#18
SA of sphere = 4πr^2 < you must know that!
= 4π(25) = 100π = 314 to the nearest m^2
#19
Yeahhh, you got one right 
david
#1 is not correct lmao

david
#1 is not correct reiny lmao

Um
Yes it is david

wot a' ya do'in M8?!
The answers are:
1. C
2. D
3. sry, I even need help on this one
4. B
5. B
6. B
7. A
8. B
9. D
10. A
11. C
12. D
I know there are more questions but, you know the laziness. I'm just going to give you 12 answers, not all 19, sry.
Hope this helped! :D
Just a warning, my questions may be different so the answers may also be different because yes, they do change the questions once in a while, so don't comment that I probably didn't give you a good grade. 
M8 is legit
F*ck you bro i got them all right you smart son of a b***h

Chocolate_unicorn
1. Which solid has one base that is a rectangle and four lateral surfaces that are triangles?
Answer: C  Rectangular Prism
Rectangular prism have one rectangular base.
2. A solid with two parallel and congruent bases cannot be which of the following?
Answer: A  Cylinder
Since the bases in a cylinder ar circular, they cannot be parallel.
3. Which of the following are considered skey lines? Diagram is a
Options:
A. AC and DF
B. AD and CF
C. BE and DF < Correct answer. These lines do not intersect and are not parallel.
D. BE and BC
4. What is the base plan for the set of stacked cubes?
There are two cubes in the front row ( side by side)
 There are two cubes in the middle row ( one on top of the other)
 Ther are three cubes in the back row (one on top of the other ) and one cube attached to the right of these three cubes.
Correct Answer: D
5. Which of the following is the front few of the model?
 There are two cubes in the front row ( side by side)
 There are two cubes in the middle row ( one on top of the other)
 There are five cubes on the back row ( three stacked on top of each other and two cubes attached (side by side) to those stacked cubes on the left side
Correct Answer: B
6. Which solid does the net form?
A. hexagonal prism
B. hexagonal pyramid < ANSWER The bases are hexgons and the lateral faces are rectangles.
C. rectangular prism
D. rectangular pyramid
7. Which solid does the net form?
A. Square Pyramid < ANSWER The base is a square.
B. Triangular Prism
C. Triangular Pyramid
D. Cube
8. What is the surface area of the given figure?
Triangular prism with the following measurements: 20 cm, 32 cm, 16 cm , and 12 cm.
Here are the steps:
1) 12 x 16 = 192
2) 192 / 3 = 64
3) 192 / 3 = 64
4) 192 / 3 = 64
5) 12 x 32 = 384
6) 32 x 20 = 640
7) Add Steps 2  6 > 64 + 64 + 64 +384 + 640 = 1,216 cm^2 (ANSWER)
9. Use the net to find the approximate surface area of the cylinder to the nearest square meter.
There is a cylinder with a radius of 7m and a height of 11 m.
Use the value 3.14 for pi
Surface Area = 2 x pi x radius x height
= 2 x 3.14 x 7 x 11
= 483.56 m^2 > Rounded up > 484 m^2 ( ANSWER)
10. What is the volume of the prism to the nearest whole unit.
There is a rectangular box with the following measurements 11 in , 9 in, and 3 in
Step 1) Add all the measurments together
11 in + 9 in + 3 in = 23 in^3 (ANSWER)
11.) What is the volume of the triangular prism to the nearest whole unit ?
There is triangular prism, think triangular box. It has the following dimensions
2 ft , 12 ft , and 18 ft
Step 1) Multiply 2 x 12 x 18 = 432
Step 2) Double 432  > 432 + 432 = 864 ft^3 (ANSWER)
12.) What is the volume of the cone to the nearest whole unit?
There is a cone with with a circular radius of 6 inches and a cone height of 11 inches.
Use 3.14 for pi
Step 01) 3 x pi x radius x 2 x height
Step 02) 3 x 3.14 x 6 x 2 x 11
Step 03) 1,243.44 > 1, 244 in^3 ( ANSWER)
13.) What is the volume of the pyramid to the nearest whole unit?
There is a pyramid with the measurements 7yds, 9yds, and 7yds (height)
Step 01) Multiply 7 x 9 = 63
Step 02) Divide 63 / 2 = 31.5
Step 03) Multiply 31.5 by the height > 31.5 x 7 = 220.5 Round up to 221 yd^3 (ANSWER)
14.) What is the slant height for the given pyramid to the nearest whole unit?
Pyramid base = 6 cm
Height = 4 cm
6^2 + 4^2 = C^2
6 x 6 + 4 x 4 = C^2
36 + 16 = C^2
52 = C^2
SquareRoot 52 = SquareRoot C^2
7.2 = C
Round 7.2 to the nearest whole > 7 cm (ANSWER)
15) What is the length of the diagonal for the given rectangular prism to the nearest whole unit?
Length = 12 cm
Width = 4 cm
Height = 9 cm
Step 01) 12 ^ 2 + 4 ^ 2 = C^2
144 + 16 = C^2
160 = C^2
SquareRoot 160 = SquareRoot C^2
12. 6 = C (Diagonal)
12.6 Rounded to the nearest whole > 13 cm (ANSWER)
16) The cones below are similar, although not drawn to scale.
Small Cone: r = 5ft and 15ft Big Cone = x and 18ft
Step 1) 15 / 5(r) = 3
Step 2) 18 / x (r) = 3. What number when you divide 18 by it is 3? .......It is 6 duuuhhhhh
B.) 6 (ANSWER)
17. ) A cone has a radius of 40 cm and a volume of 1,875 cm^3. What is the volume of a similar cone with a radius of 16 cm?
Step 1) 40/16 = 2.5
Step 2) Divide 1, 875 by 2.5 = 750 cm^3 (ANSWER)
18) What is the area of a sphere with a radius of 5 meters rounded to the nearest square meter?
Step 01) A = 4 x pi x r^3 > A = 4 x 3.14 x 5^3 > A = 4 x 3.14 x 5 x 5 x 5 > A = 1,570
Step 02) Divide the answer above , 1, 570 by 3 > 1,570 / 3 = 523.33 <Round down is 523m^2
D) 523 m ^2 (ANSWER)
19.) What is the volume of a sphere with a radius of 4 meters rounded to the nearest square meter?
Step 01) Use formula = 4 x pi x r^2 > 4 x 3.14 x 4^2 > 4 x 3.14 x 4 x 4 > 200.96 m^3
Round 200.96 to the nearest whole is 201 m^3.
B) 201 m^3 (ANSWER)
20.) Find the lateral area of the square pyramid.
There is a square pyramid with the measurements 8 m , 8m and a height of 22 m
Step 01) Area ofa the Square Base 8 x 8 = 64
Step 02) Area of each Triangle 8 x 22 = 176
Step 03) There are four triangles multiply 176 x 4 = 704
Step 05) Divide 704/ 2 = 352
Step 06) Add 64 + 352 = 416 m^2 (ANSWER)
21) Find the surfacea area of the cone. Use 3.14 for pi.
There is cone with the diameter of 8 in and 7 in for slant height.
Step 01) pi x 8^2 > 3.14 x 8 x 8 = 200.96
Step 02) 200.96 x 7 = 1 , 406.72
Step 03) 1, 402.77 divide by 3 = 468. 9 in^2 (ANSWER)
22) Find the volume of the cylinder. Use 3.14 for pi
There is a cylinder with a radius of 34 m and a height of 27
Step 01) pi x r^2
Step 02) 3.14 x 34^2 = 3.14 x 34 x 34 = 3, 629. 84
Step 03) 3,629 x 27 = 98, 005. 68 m^3 (ANSWER)
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