EXOEXOEXO
  • EXOEXOEXO
find the area of the trapezoid
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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EXOEXOEXO
  • EXOEXOEXO
|dw:1436916462396:dw|
pooja195
  • pooja195
\[\huge~\rm~A=\frac{ a+b }{ 2}h\]
pooja195
  • pooja195
Can you figure out what a b h are?

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More answers

pooja195
  • pooja195
remember that a trapezoid has 2 bases
EXOEXOEXO
  • EXOEXOEXO
the answer choices are a) 44 b) 48 c) 90 cd) 100
EXOEXOEXO
  • EXOEXOEXO
*d) 100
jdoe0001
  • jdoe0001
hmmmm how did you get 100?
pooja195
  • pooja195
\[\huge~\rm~A=\frac{ a+b }{ 2}h\]Can you figure out what a b h are?
pooja195
  • pooja195
@jdoe0001 he meant the answer choice :P
jdoe0001
  • jdoe0001
ohh ahemm hehe
EXOEXOEXO
  • EXOEXOEXO
a and b are the bases of the trapezoid
pooja195
  • pooja195
right what are their values?
jdoe0001
  • jdoe0001
hint |dw:1436917508346:dw|
EXOEXOEXO
  • EXOEXOEXO
8+14/2=22/2=11 5x11=55
pooja195
  • pooja195
a=8 b=14 h=?
jdoe0001
  • jdoe0001
|dw:1436917675313:dw|
EXOEXOEXO
  • EXOEXOEXO
how do you find the height?
pooja195
  • pooja195
its given
jdoe0001
  • jdoe0001
well.. I should have put the tickmark on the side itself =( |dw:1436917793358:dw|
pooja195
  • pooja195
|dw:1436916989730:dw| look at this thing that @jdoe0001 drew
Vocaloid
  • Vocaloid
we have a bit of a misunderstanding here, the height isn't 5 |dw:1436917040544:dw|
jdoe0001
  • jdoe0001
if the two slanted sides, are equal, that means, the angles they make above and down below, are also equal and if those angles are equal, the "gaps" at the bottom are also equal
Vocaloid
  • Vocaloid
now, if we take one of the triangles on the side, we can solve for height using the Pythagorean theorem |dw:1436917106452:dw|
EXOEXOEXO
  • EXOEXOEXO
h=2
jdoe0001
  • jdoe0001
hehee anyhow @EXOEXOEXO Vocaloid just pull "3" out of his pocket there any ideas where he got that from?
EXOEXOEXO
  • EXOEXOEXO
nvm
Vocaloid
  • Vocaloid
oh, right I should probably explain where the 3 came from, haha |dw:1436917232181:dw|
EXOEXOEXO
  • EXOEXOEXO
h=4
Vocaloid
  • Vocaloid
(I drew a rectangle connecting the bottom of the trapezoid to the top of the rectangle, giving us 8 + 2x = 14, meaning that each of the little segments is 3) but yeah, h = 4, and now you can go back to the formula
wolf1728
  • wolf1728
I found a formula for the height here: http://www.1728.org/quadtrap.htm We will have to call: a = 14 b = 5 c = 8 d = 5 height^2 = (a+b+-c+d)*(-a+b+c+d)*(a-b-c+d)*(a*b-c-d) / 4 * (a -c)^2 height^2 = (16*4*6*6) / 4 * 36 height^2 = 16 height = 4
wolf1728
  • wolf1728
Hey hey we agree about the height !! :-)
EXOEXOEXO
  • EXOEXOEXO
thanks everyone for helping me!
wolf1728
  • wolf1728
Area = [(a+c) / 2] * height Area = [(14 + 8) / 2] * 4 Area = 44
wolf1728
  • wolf1728
'sokay - glad to help out :-)

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