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Mathematics 9 Online
OpenStudy (anonymous):

Find the area of the trapezoid. Leave your answer in simplest radical form. The figure is not drawn to scale. 10 cm2 44 cm2 48 cm2 20 cm2

OpenStudy (anonymous):

OpenStudy (anonymous):

\[A=\frac{ 1 }{ 2 }h(a+b)\]

OpenStudy (anonymous):

so 20 cm

OpenStudy (anonymous):

h= height of trapezoid. a and b are the two bases of the trapezoid

jimthompson5910 (jim_thompson5910):

a pic might help |dw:1359172172039:dw|

OpenStudy (anonymous):

where did you get the additonal 4? under the 45

jimthompson5910 (jim_thompson5910):

in any 45-45-90 triangle, the two legs are congruent

OpenStudy (anonymous):

\[\tan(45)=\frac{ 4 }{ x }\]

jimthompson5910 (jim_thompson5910):

one leg is given to be 4, so the other leg must be 4

OpenStudy (anonymous):

oh so is it 44cm2

jimthompson5910 (jim_thompson5910):

good

OpenStudy (anonymous):

thank you can you help me with another?

jimthompson5910 (jim_thompson5910):

sure one more

OpenStudy (anonymous):

@jim_thompson5910 http://openstudy.com/study#/updates/5103533ae4b0ad57a562e3b3

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