A right triangle has legs of length 6 and 8. What is the length of its hypotenuse?

Answer and explanation

Correct answer: A. 10

  1. Step 1: Apply the Pythagorean theorem : .
  2. Step 2: Compute the squares and sum them: .
  3. Step 3: Take the square root: .
Answer
.
Why not the others: is the simple sum of the legs (), which violates the right triangle relation.

Practise more Geometry and trigonometry.

Free questions with an explanation for every one, and full timed SAT mock tests.