Simplify the following text for a Grade 8 native English-speaking person.
Original: In any right triangle , the area of the square whose side is the hypotenuse ( the side opposite the right angle ) is equal to the sum of the areas of the squares whose sides are the two legs ( the two sides that meet at a right angle ) .
Simplified: The side opposite to the right angle is the hypotenuse ; it is the longest side in the right triangle .