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.
Senator Joseph McCarthy accused many Americans of being communists, which led to loss of employment for many artists, teachers, and government employees. Several prominent figures, including Eleanor Roosevelt, Martin Luther King Jr., John Kennedy, and Richard Nixon, helped shape America's modern era.