Question

If you know the length of sides a and c of a right triangle, which equation represents the length of side b, according to the pythagorean theorem?

(answer choices in picture)

Answer 1

b = √( c² - a² )

Explanation:

Equation to find the length of a right angle using pythagorean theoram is,

a ² + b² = c²

According to the question you have find the length of b side.

For that, you have to make b as the subject in this equation.

Let us solve now.

a ² + b² = c²

b² = c² - a²

b = √( c² - a² )

Therefore,

3rd Answer is correct.

Hope this helps you :-)

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