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Mathematics
OpenStudy (anonymous):

What is the perimeter of the following polygon? Answer 22 units 28 units 36 units 44 units

OpenStudy (anonymous):

OpenStudy (callisto):

perimeter = 13+13+10 = 36

OpenStudy (callisto):

use pyth thm to find the unknown length

OpenStudy (anonymous):

This problem can be reduced to mental math if you recognize the 5-12-13 right triangles. Not as common as the 3-4-5 triangles, but they show up in textbook problems often enough that knowing them is a good thing.

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