anonymous
  • anonymous
The area of an isosceles trapezoid is 90 in squared, the height is 6 inches, and the congruent legs are 10 inches. Find the length of the longer base.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Owlfred
  • Owlfred
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amistre64
  • amistre64
take out the area that they give you and your left with a triangle right?
amistre64
  • amistre64
90 - 60 =30 we have an area of 30 to account for

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More answers

anonymous
  • anonymous
I dont think im following you. How'd you get 60?
amistre64
  • amistre64
the height is 6 so....... 6b/2 = 30 3b = 30 b = 10 more than the other one
amistre64
  • amistre64
the area of a rectangle is base times height right? 6.10 = 60
amistre64
  • amistre64
90 total - 60 that is given = 30 left
anonymous
  • anonymous
But 10 is the leg not a base. So it would make triangle not a square right?
amistre64
  • amistre64
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amistre64
  • amistre64
the longer base = 20
amistre64
  • amistre64
i see it lol
anonymous
  • anonymous
Im confused. What is 90 and how did you know that 10 was the base>>
amistre64
  • amistre64
then we pythag it to find the 'base'
anonymous
  • anonymous
see what?
amistre64
  • amistre64
i see that i read the problem wrong and know how to fix it...
amistre64
  • amistre64
6^2 + b^2 = 10^2 b^2 = 100 - 36 b = sqrt(64) = 8 , roght?
amistre64
  • amistre64
like this; and the problem says the trap area = 90
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anonymous
  • anonymous
Hold on im working it out
anonymous
  • anonymous
Right i got that
amistre64
  • amistre64
6*16 ----- = 48 for the 'area' of the triangle 2 90 - 48 = 42 6(7) = 42...... small side = 7 large side = 23 then right?
amistre64
  • amistre64
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anonymous
  • anonymous
im working it
anonymous
  • anonymous
Wait I think I'm getting it but your saying 48 is the area for both the small triangles right?
amistre64
  • amistre64
yes;
amistre64
  • amistre64
together they make one triangle with a height of 6 and a base of 16
anonymous
  • anonymous
Oh! I got it. THanks for the help

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