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OpenStudy (anonymous):
a triangle has side lenghts of 15, 20, and 25. what type of triangle is it?
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OpenStudy (anonymous):
right angled
OpenStudy (anonymous):
explain
OpenStudy (angela210793):
If 25^2=15^2+20^2 then it is a right angled triangle
OpenStudy (anonymous):
because 25^2 = 20^2 + 15^2 (Pythagoras)
OpenStudy (anonymous):
the 2 lowest right angled triangles with whole numbers are 3,4,5 and 5,12,13 15,20,25 is a multiple of the first one
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