Question

Find the surface area of the right triangular prism below. http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-A09/b/assessments/SA-SurfaceAreaandVolumeUnitExam/Geometry_9_Exam_FINAL_LT_060909_5q.jpg

A. 264 in^2
B. 408 in^2
C. 384 in^2
D. 246 in^2

Answer 1

@mathmale i really need help

Answer 2

@jim_thompson5910 please help? I got A as my answer but I'm not sure...

Answer 3

the answer is B

Answer 4

408 in^2

Answer 5

are you sure?

Answer 6

yes..yes..yes.....!!!!

Answer 7

can you show me your work? just so i'm sure.

Answer 8

ok... first compute for the area of a triangle with height 8 and base 6...can u show it..?

Answer 9

u get me..?

Answer 10

@J-D: Thanks for your contributions. However, please do not give away what you think is the correct answer. I do like the part where you ask vera to compute the area of a triangle with given dimensions. Let her do the work, with your guidance. Thanks.

Answer 11

Vera: If you have a triangle of height h and base b, the area of the triangle is A=(1/2) (b) (h). Please use this formula and the given dimensions to calculate this area. Note that J-D has repeated these dimensions in his recent post, above.

Answer 12

Therefore, the area of this triangle is A = (1/2) ( ? )*( ? ).

Answer 13

8 and 6

Answer 14

the area is 24 right?

Answer 15

Yes, and so ... Great! Best if you include the units of measurement. What are they in this case? The area of the base is A = 24 ( which units? )

Answer 16

inches^2

Answer 17

Find the volume of the figure below.
http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-A09/b/assessments/SA-SurfaceAreaandVolumeUnitExam/Geometry_9_Exam_FINAL_LT_060909_24q.jpg

Answer 18

@mathmale i got 20.11 is that correct?

Answer 19

first what is the formula for the volume of that figure do u know..?

Answer 20

V=lwh/3

Answer 21

J-D will explain how you could check that answer yourself. Personally, i'd ask you to compute the volume with the quantities in different order (base, height,altitude; height, base, althtude; and so on. usually, especially if your formula is correct, y ou'll be right if all of your different answers are the same magnitude.

Answer 22

can you explain pleaseee? @mathmale i have to go to bed soon and i have to submit this today

Answer 23

the formula you've posted looks like the one for a solid pointed at the top (as a cone is pointed at the top).

Answer 24

ok compute for the area of a triangle....whats the area..?

Answer 25

what? sorry i'm really confused...

Answer 26

what is the formula for the area of a triangle....?

Answer 27

1/2bh

Answer 28

so can u name ur base and the height of the triangle in the figure...?

Answer 29

These are my answer choices. Which one looks right?
20.11 mi^3

63.17 mi^3

40.22 mi^3

31.59 mi^3

Answer 30

@J-D ?

Answer 31

sorry i cant give u the final answer.. just compute it ill guide on how...

Answer 32

ok just guide me. i'm a little lost lol ;)

Answer 33

so can u identify the base and the height of ur triangle..?

Answer 34

4.7 and 4.2 right?

Answer 35

yes.. so compute now ur area..

Answer 36

19.74

Answer 37

divide it by 2..

Answer 38

9.87

Answer 39

so to find the volume just multipy it by the lenght of ur figure..

Answer 40

41.454 is what i got

Answer 41

how did u arrive with that answer.. just multiplu the area by the lenght..

Answer 42

9.87 x 6.4?

Answer 43

yes thats right..

Answer 44

63.168

Answer 45

yup...congrats....:)

Answer 46

Are all points on a sphere equidistant from the center of the sphere?

Answer 47

@J-D do you know?

Answer 48

i think its yes,...or maybe ask another one....

Answer 49

All points on a sphere are definitely equidistant from the center of the sphere. In fact, that's one of the definitions of a sphere.

Pretty please, Vera, post each question separately, OK?