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.
1 They were called RAF, short for Royal Air Force. 2  Some people have said Barbarella, but that was the name of the Jane Fonda movie in which they got their name from the character, Duran Duran. 3  Some have said Arcadia, but that was the band formed by Simon, Nick and Roger after D2 broke up.