Activity › Discussion › Math › Pythagoras theorem › Reply To: Pythagoras theorem
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As per Pythagoras theorem,
the square of length of hypotenuse (3rd or non perpendicular side) = Sum of squares of two perpendicular sides.
Here let us name the two perpendicular sides as a= 5 , b=8 and the 3rd side as c (the hypotenuse)
So using Pythagoras theorem:-
c^2 = a^2 + b^2
=> c^2 = 5^2 + 8^2
=> c^2 = 25 +64
=> c^2 = 89
=> c = √89
=> c = 9.434 (approximate) is the length of 3rd side
(note: students not having access to calculators can stop at the c = √89 step which is also correct )👍