The right triangle has one 90 degree angle and two acute (< 90 degree) angles. Since the sum of the angles of a triangle is always 180 degrees... y + z = 90 degrees. The two sides of the triangle that are by the right angle are called the legs... and the side opposite of the right angle is called the hypotenuse.
They were called the Hollywood 10 and accused of being communist. I don't think you would find many people who can name them all.
McCarthy stepped in and said that if Welch was so concerned about persons aiding the Communist Party, he should check on a man in his Boston law office named Fred Fisher, who had once belonged to the National Lawyers Guild, which Brownell had called the legal mouthpiece of the Communist Party.