Just think about it
right angles are the very definition of perpendicular
how many right angles in a full rotation? 4
answer is 4
The legs of a right triangle are the sides that are connected to the 90 degree (right) angle. The remaining side is called the hypotenuse.
Another way to look at it is the two legs of a right triangle are the two shorter sides. The longest side is the hypotenuse.
The answer is 104 centimeters squared :)
(The first one)
B and C because both bases are squares
