How do you use the pythagorean theorem to solve for the missing side given: a = 15, b = ?, c = 25?

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Answer 1 · 2016-03-27T07:56:27

#b=20#

Consider the diagram

enter image source here

This is a right angled triangle

Use pythagorean theorem

#color(blue)(a^2+b^2=c^2#

Where

#color(red)(a=15,b=b# #(examp##l##e)# #color(red)(c=25#

#rarr15^2+b^2=25^2#

#rarr225+b^2=625#

#rarrb^2=625-225#

#rarrb^2=400#

#rArrcolor(green)(b=sqrt400=20#