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Mathematics 20 Online
OpenStudy (anonymous):

What is the length of missing side b in the figure below?

OpenStudy (anonymous):

13^2 - 7^2 = b^2

OpenStudy (anonymous):

169-49 = b^2

OpenStudy (anonymous):

120 centimeters?

OpenStudy (anonymous):

sqrt(120) cm

OpenStudy (anonymous):

thankyou

OpenStudy (anonymous):

@lisa12382 not 120 \[b^2=13^2-7^2\] \[b^2=169-49\] \[b^2=120\] now take square root \[b=\sqrt{120}=10.95\]

OpenStudy (anonymous):

so 91?

OpenStudy (anonymous):

@lisa12382 10.91cm as above calculated

OpenStudy (anonymous):

but thats not my answer choices

OpenStudy (anonymous):

matt is right

OpenStudy (anonymous):

what are your choices?

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