Question

if one side of a triangle is 5 cm and other 12 cm then what is the length of its third side

Answer 1

if it is a right angle triangle

then by using Pythagoras theorem

ab2+bc2=ac2
(5)2+(12)2=(ac)2

25+144=(ac)2
169=(ac)2

(13)2=(ac)2
Rooting on both sides
13=ac

Then the third side of the triangle is 13 cm


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