1. helpmeplz311

@Hero

2. helpmeplz311

@timo86m

3. helpmeplz311

i got 56 as p 187 as b lateral as 672 total as 706 correct?

4. helpmeplz311

Number one.

5. AriPotta

i got 1046 for total

6. helpmeplz311

how? i keep getting that wrong..

7. AriPotta

surface area of a rectangular prism = Ph + 2B 56(12) + 2(187) = 1046

8. helpmeplz311

i did 56 x 12 x + 2 x 17

9. helpmeplz311

oh. one EIGHT seven. howd u get that?

10. AriPotta

but 187 is B lol

11. helpmeplz311

area of the base... 17 x 17?

12. timo86m

1 is easy just add up the sides of the figure

13. AriPotta

you already figured out that B = 187

14. helpmeplz311

oh times 11. ok

15. helpmeplz311

yes, ma'am

16. helpmeplz311

ok. ill correct that.

17. helpmeplz311

done

18. AriPotta

what's the second figure?

19. helpmeplz311

triangular prism

20. AriPotta

yep, and what's the perimeter of the base?

21. helpmeplz311

22. helpmeplz311

42?

23. timo86m

btw in the first pic dont include the floor/ base of figure since you dont need to paint that :P

24. helpmeplz311

in^2?

25. helpmeplz311

ok timo:)

26. AriPotta

the base of a triangular prism is a triangle, you should get 36 as the perimeter

27. AriPotta

and i think timo is talking about number 6? we're only on number 2

28. helpmeplz311

um,is it not 9+12+9+12?

29. AriPotta

no, because it's a triangle, not a square or rectangle. so add up 9, 12, and 15

30. helpmeplz311

oh. ok.. i get it:)

31. helpmeplz311

let me write that

32. helpmeplz311

done

33. helpmeplz311

b would be..umm..let me calculate..

34. helpmeplz311

um, 54?

35. AriPotta

yep :)

36. helpmeplz311

yay! im finally getting it! tnx to the awesome ari! i mean 296!

37. helpmeplz311

ok,let me write 54 down.

38. helpmeplz311

done

39. helpmeplz311

ok, eo,lateral, let me try.

40. helpmeplz311

324

41. AriPotta

no. the lateral area would be the rectangles

42. helpmeplz311

oh. but are the formu,as not the same or smthing?

43. AriPotta

no, they're not. that formula was for a rectangular prism. this is a triangular prism

44. helpmeplz311

because it too asks for the lateral area of the triang. prism

45. helpmeplz311

can u plz explain for the triang prism?

46. AriPotta

just find the areas for each of the rectangles and add them together

47. helpmeplz311

oh. um, let me try,

48. helpmeplz311

438?

49. AriPotta

no

50. helpmeplz311

aah! um, area of a triangle is bh,yes?

51. AriPotta

you're not trying to find the area of the triangle. you're finding the areas of each of the rectangles

52. AriPotta

and area of a triangle = bh/2

53. helpmeplz311

ohh. so im actually finding the area of rectangles as those a re the laterals'/sides?

54. AriPotta

yes.

55. helpmeplz311

ohh. ok,once more..

56. helpmeplz311

um, was it more or less than my last answ er?

57. AriPotta

...more.

58. helpmeplz311

372?

59. AriPotta

311, i gotta do some chemistry soon. no.

60. helpmeplz311

you have to include the 15?

61. helpmeplz311

ok,last try. 444.

62. AriPotta

what's the area of this rectangle?

63. helpmeplz311

yes, 22 x 12, no?

64. AriPotta

yes, which is...

65. helpmeplz311

umm,264

66. AriPotta

yes. and what's the area of this rectangle?

67. helpmeplz311

umm, 350

68. helpmeplz311

594?

69. AriPotta

why are you guessing? what's 22 x 15?

70. helpmeplz311

350

71. AriPotta

it's 330

72. AriPotta

and what's the area of this rectangle?

73. helpmeplz311

im using a calculator.

74. AriPotta

i'm using one too. it's 330

75. helpmeplz311

the first i said 264

76. helpmeplz311

i put 22*15 into web22.0calc

77. AriPotta

maybe you should use a different calculator

78. helpmeplz311

umm,let me see. then..

79. AriPotta
80. helpmeplz311

81. AriPotta

so what's the area of that last rectangle?

82. helpmeplz311

um,the first one was 264. the second 330?

83. AriPotta

what's the area of this rectangle...

84. helpmeplz311

9 x 12?

85. AriPotta

9 x 22...

86. helpmeplz311

umm 198

87. AriPotta

yes. so what's 198 + 330 + 264?

88. helpmeplz311

um 762

89. AriPotta

792

90. helpmeplz311

ok. ill let you alone now. tnx ill search for someone elses hellp if u like

91. AriPotta

i was gonna finish helping you with this one. you still have to find total surface area

92. helpmeplz311

o yea

93. AriPotta

so 792 is our lateral area, all we have to do is add the areas of those two triangle. what do you get?

94. AriPotta

triangles*

95. helpmeplz311

um... let me se..

96. helpmeplz311

is 12 tthe base?

97. AriPotta

the base is the triangle. you've already found the area of the base. it's 54. all you have to do is: 792 + 54 + 54 = ?

98. helpmeplz311

ok. um

99. helpmeplz311

900

100. AriPotta

yes!

101. AriPotta

does that make sense? what we did?

102. helpmeplz311

finally. tnx,ari:) ill stop botheringn u now

103. helpmeplz311

um,yes u believe so

104. helpmeplz311

i*

105. AriPotta

idk if you already have one or not, or if you can even see it...but i think this will help you: http://learn.flvs.net/educator/common/StephanieLundy/EOCreferencesheet.pdf

106. helpmeplz311

ok.tnx:)

107. helpmeplz311

108. AriPotta

109. helpmeplz311

i dont think so

110. AriPotta

:L maybe they will... @Hero @JakeV8

111. helpmeplz311

ok. ill try them on my own first

112. AriPotta

mmk. i'm off the chem. gl :)

113. AriPotta

off to*

114. helpmeplz311

hi jake its only 4 probs

115. helpmeplz311

okay 296:) tnx for ur help

116. AriPotta

no problem :) make sure you tell him you've done one and two on the second link

117. AriPotta

well, i guess i just did lol. nvm

118. helpmeplz311

okay. jake, ive done one and two on the second link:D

119. JakeV8

120. helpmeplz311

and i need not do the bonus

121. helpmeplz311

ok. lol p isperimeter of base

122. helpmeplz311

b is area of base

123. JakeV8

And you're up to # 3 on the 2nd link, as sayeth @AriPotta ?

124. helpmeplz311

yes

125. JakeV8

They show you all three leg-lengths on the picture... one is one the bottom, two are shown on the top. Just add 'em up...

126. helpmeplz311

i want to try and talk old fashionedly noe lol

127. helpmeplz311

jake pls can u work them out and explain asnu gi along? please?

128. helpmeplz311

its 4 probs

129. JakeV8

look at the diagram... see how it shows one of the bottom sides as 8? And the top shows the other two sides as 7 and 5 Perimeter = 8 + 7 + 5

130. helpmeplz311

131. helpmeplz311

20

132. JakeV8

Adding is good. Reading the diagram and realizing that all you need to do for perimeter is add those 3 sides is even better. For # 3, P = 20 is correct.

133. helpmeplz311

yay! ok, now, b

134. JakeV8

B is the area of the base. The formula for area of a triangle is, as you surely know, 1/2 * base * height Again, the base side has length 8. And the height is shown as 4.3. (I'm just reading the diagram... no magic) So find 1/2 * 8 * 4.3

135. helpmeplz311

ok,sir

136. JakeV8

What did you get?

137. helpmeplz311

17.2

138. helpmeplz311

Jame, Ive to go soon. But, if you leave explanations to thhe three remaining problems,mi will give you a medal.

139. JakeV8

Ok, great. Next is lateral surface area. Check that diagram again... the side surfaces are all rectangles, right? And area of a rectangle is length X width, or length X height (basically one side X the other side). So, please tell me the the length and height, then multiply to get the area of each of the 3 lateral side surfaces: Lateral side 1: Length: Height: Length X Height = ? Lateral side 2: Length: Height: Length X Height = ? Lateral side 3: Length: Height: Length X Height = ? This is really easy... it's just reading the length of each edge, and all the heights are the same... then it's easy multiplying... you know how to do this.

140. helpmeplz311

oops s, jake*

141. helpmeplz311

Yes,? please. i am begging you. ill rereadmthe explanation so i get them.

142. helpmeplz311

itmis 11:00 pm where i amAnd ive to get up early tmrw

143. helpmeplz311

144. helpmeplz311

i would very much appreciate itnif u droppedoff thenanswersnhere. i really really need them:/

145. JakeV8

This is like a puzzle... you find the bottom area... and the bottom area is the same as the top area. Then, you find the side areas... then you add the bottom, top, and all 3 sides together. You found the bottom area earlier... 17.2. So that's also the top area... Now you have to find the sum of all the side areas... All sides are rectangles with area = length X height So the first is : length1 * height And the 2nd is : length2 * height And the 3rd is : length3 * height And the sum of all three areas is: length1 * height + length2 * height + length3 * height But since height is the same, you can think of "distributive property" and rewrite the lateral side areas as: height * (length 1 + length2 + length3) And notice that adding those 3 lengths together is the same as the perimeter, and you already found that to be 20. So the lateral side area is height * perimeter = height * 20

146. helpmeplz311

please please please leave the remaining answers to the third one and fourth on this image and the other two probs on the second image as well youll be rewarded.

147. JakeV8

So put in the value of the height (height = 9), and solve for lateral side area... that's the 3rd part. Then, for total surface area, add the lateral side area you just now found to the top area + the bottom area... remember, those were each 17.2 So the total surface area = (9 * height) + 17.2 + 17.2

148. helpmeplz311

um and the height would be 4.3,yes?

149. JakeV8

no that's the height of the base side. Height of the prism itself is shown as 9

150. helpmeplz311

um, ok 180

151. JakeV8

that's the 3rd part... lateral side area = 120

152. JakeV8

oops, 180, sorry!!!!!!!!!

153. helpmeplz311

i have to go:/ please:/ have mercy:/

154. JakeV8

3rd part: lateral side area = 180 4th part: total area = 180 + top + bottom = 180 + 17.2 + 17.2 = 180 + 34.4 = 214.4

155. helpmeplz311