SOLUTION: Find the length of a diagonal of a rectangle with length 8cm and width 4 cm?
I dont exactly know how to do this and this would be an example to help finish my work?
Please and th
Algebra ->
Pythagorean-theorem
-> SOLUTION: Find the length of a diagonal of a rectangle with length 8cm and width 4 cm?
I dont exactly know how to do this and this would be an example to help finish my work?
Please and th
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Question 938083: Find the length of a diagonal of a rectangle with length 8cm and width 4 cm?
I dont exactly know how to do this and this would be an example to help finish my work?
Please and thank you Found 2 solutions by ewatrrr, Edwin McCravy:Answer by ewatrrr(24785) (Show Source):
The green line labeled D is the diagonal. Let's erase the left
and top sides of the rectangle, like this:
Now as you see, we only have a right triangle and its hypotenuse
is D. So we use the Pythagorean theorem:
D² = 8² + 4²
D² = 64 + 16
D² = 80
D =
You can either do that with a calculator and get
D = 8.94427191 cm., rounding it
off as your teacher requires.
Or else you can give the exact answer in radical form:
D = cm
Edwin
.