The hypotenuse of a right triangle is the side opposite the?

a. 90 degree angle
b. smallest angle of the triangle
c. acute angle
d. top angle

I believe it is a

You're right.

You are correct! The hypotenuse of a right triangle is the side opposite the 90-degree angle.

To determine this, you can use the Pythagorean theorem, which states that in a right triangle, the sum of the squares of the lengths of the two legs (the sides adjacent to the right angle) is equal to the square of the length of the hypotenuse. In other words:

a^2 + b^2 = c^2

Where:
- a and b are the lengths of the legs
- c is the length of the hypotenuse

Since the hypotenuse is the longest side of a right triangle and opposite the right angle, it corresponds to the 90-degree angle. Thus, option a. 90-degree angle is the correct answer.