## mvrc1996 Group Title The total area of the rectangular prism shown is one year ago one year ago

1. mvrc1996 Group Title

2. jazy Group Title

What do you need to find?

3. mvrc1996 Group Title

the total are of that retangular

4. mvrc1996 Group Title

i mean that prism

5. jazy Group Title

Ok, do you know the formula to find the area of a rectangle?

6. mvrc1996 Group Title

the formula my math gives me to find the answer is total area= ph+2B

7. jazy Group Title

Right! Remember that a capital P = permeter of the base, and capital B = area of the base. A = Ph + 2B So lets find the perimeter and area of the base.|dw:1363050666823:dw|

8. jazy Group Title

Can you tell me what is the perimeter of the base?

9. mvrc1996 Group Title

its not 6 is it?

10. jazy Group Title

No, that'd be the area though!

11. mvrc1996 Group Title

okay how do i find the perimeter then?

12. jazy Group Title

Remember, the perimeter is the sum of all the sides. For rectangles, there is a simple formula 2* length + 2*width

13. mvrc1996 Group Title

so its 10?

14. jazy Group Title

Right. (:

15. mvrc1996 Group Title

okayyy that helps a lot now i k how to do it

16. mvrc1996 Group Title

it ends up being 64 right?

17. mvrc1996 Group Title

if you could stay on this question please incase i have simular questions to ask

18. mvrc1996 Group Title

62 i meant

19. jazy Group Title

So we have: P = 6 B = 10 h = 5 A = Ph + 2B A = 6(5) + 2(10)

20. jazy Group Title

Sorry but I've gotta go. I'll be back in about 15-20 min.

21. mvrc1996 Group Title

Find the total area of the prism.

22. jazy Group Title

Same steps. A = Ph + 2B So lets find the perimeter and area of the base. |dw:1363053998087:dw|

23. jazy Group Title

Perimeter = 12 * 4 = ? Area = 12 * 12 = ?

24. mvrc1996 Group Title

144

25. mvrc1996 Group Title

nvm ik how to do that one i need help with another

26. mvrc1996 Group Title

Find the lateral area for the prism.

27. jazy Group Title

Great! Lateral area is the area of the faces, not including the bases of the figure. The formula for this is: LA = Ph (P = perimeter of the base) |dw:1363054464534:dw|We need to find the missing side length.

28. mvrc1996 Group Title

how do i do that? i forget is it 8?

29. jazy Group Title

To do this we use the Pythagorean theorem: $\large a^2 + b^2 = c^2$Where a, b, and c are the side lengths. ****c always stands for the hypotenuse(longest side)**** So we have: $\large 6^2 + 4^2 = c^2$$\large 36 + 16 = c^2$$\large 52 = c^2$Find the square root to solve for c.$\large \sqrt{52} =\sqrt{c^2}$$\large 7.211 = c$

30. jazy Group Title

And now we find the perimeter: |dw:1363054954194:dw|

31. mvrc1996 Group Title

so would the answer be 12+16(sqrt52)

32. mvrc1996 Group Title

?

33. jazy Group Title

Perimeter, you're simply adding all the sides. 6 + 7.2 + 4

34. mvrc1996 Group Title

no i meant the final answer

35. jazy Group Title

LA = (17.2)(8)

36. mvrc1996 Group Title

ugh im confused very confused

37. mvrc1996 Group Title

this is what its asking me to fill in

38. jazy Group Title

Oh wow. I'm sorry, hold on a second/

39. mvrc1996 Group Title

okie dokie

40. mathslover Group Title

http://hotmath.com/hotmath_help/topics/surface-area-of-a-prism.html does this show anything?

41. mathslover Group Title

I think @jazy has done right

42. mathslover Group Title

but to express in the terms I am also confused.

43. mathslover Group Title

write it : $$\large{0 + 16\sqrt{13}}$$ or $$\large{0 + 8\sqrt{52}}$$