Question

Is a triangle with sides of length 6 ft, 21 ft, 23 ft a right triangle? Explain.

Answer 1

check if the sum of the square of the two least sides equals the square of the longest side --> basically check if this satisfies the pythagoras theorem.

Answer 2

a²+b²=c²

6²+21²=36 + 441
= 477
square root 477=21.8

so this is not a right angle triangle as a²+b² is not equal to c²