Question

4.
$a^2 + b^2 = c^2$

Explanation:

Step1: Substitute values into formula

$a=3$, $b=4$, $c=5$. Compute left side: $3^2 + 4^2$

Step2: Calculate left-hand side

$3^2 + 4^2 = 9 + 16 = 25$

Step3: Calculate right-hand side

$5^2 = 25$

Step4: Compare both sides

$25 = 25$, so the equation holds.

Answer:

The triangle is a right triangle, as the Pythagorean theorem $a^2 + b^2 = c^2$ is satisfied.