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Howdy, I'm currently studying for finals and reviewing the 10 chapters of the work we've learned, I've reviewed about 7 but am currently stuck on this type of problem, I cannot find my notes and I dont know what kind of problems these are, please help!(It may be something I actually know but don't know how to solve in text form)

A rectangle has side lengths of 5 feet and 12 feet. What is the length of the diagonals of the rectangle?

 

Thank you for going over this problem and helping me with it, I may ask more questions as the afternoon ends here in the U.S

 Jun 2, 2014

Best Answer 

 #1
avatar+5478 
+34

Hello Itoen,

You can use the Pythagorean Theorem  $${{\mathtt{a}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{{\mathtt{b}}}^{{\mathtt{2}}} = {{\mathtt{c}}}^{{\mathtt{2}}}$$ to solve for the diagonal of a rectangle:)

A diagonal divides the rectangle into 2 congruent right triangles.

The sides 5 and 12 would be a and b, and c would be the longer side (the diagonal)

So  $${{\mathtt{5}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{{\mathtt{12}}}^{{\mathtt{2}}} = {{\mathtt{c}}}^{{\mathtt{2}}}$$

Simplify.

169 = c2

c = 13

 Jun 2, 2014
 #1
avatar+5478 
+34
Best Answer

Hello Itoen,

You can use the Pythagorean Theorem  $${{\mathtt{a}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{{\mathtt{b}}}^{{\mathtt{2}}} = {{\mathtt{c}}}^{{\mathtt{2}}}$$ to solve for the diagonal of a rectangle:)

A diagonal divides the rectangle into 2 congruent right triangles.

The sides 5 and 12 would be a and b, and c would be the longer side (the diagonal)

So  $${{\mathtt{5}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{{\mathtt{12}}}^{{\mathtt{2}}} = {{\mathtt{c}}}^{{\mathtt{2}}}$$

Simplify.

169 = c2

c = 13

kitty<3 Jun 2, 2014
 #2
avatar+118677 
+3

Thanks Kitty

 Jun 2, 2014

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