Question

Pythagorean theorem to determine if a triangle with sides 2 ft,5ft,4ft is a right triangle

Answer 1

$a^2 + b^2 = c^2$

$2^2 + 4^2 = 5^2$

$4 + 16 = 25$

$20 = 25$

Since 20 = 25 is clearly a false statement, the three side lengths 2 ft, 4 ft, and 5 ft do not form a right triangle.