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What is the diagonal of a 9 in x 12 in rectangle?
9 years ago

Answers

Steve
recall the Pythagorean Theorem.

d^2 = 9^2 + 12^2 = 81+144 = 225
do, d=15

Also, it helps to recall a few simple and commonly used right triangles. The most basic is

3-4-5

Your 9-12-15 triangle is just a 3-4-5 scaled up by a factor of 3.
9 years ago
Anon
Thanks!
9 years ago

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