A right triangle (American English) or right-angled triangle (British English) is a triangle in which one angle is a right angle (that is, a 90- degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry. The side opposite the right angle is called the hypotenuse (side c in the figure). The sides adjacent to the right angle are called legs (or catheti, singular: cathetus).
Who was the first person to invent television? The first person to invent a fully functional television was Philo Taylor Farnsworth, an amateur inventor from Idaho. He publicly displayed his invention in 1927 but had conceived of the technology as early as 1921, when he was only 14 years old.
It was in June of 1956, that the practical television remote controller first entered the American home. However, as far back as 1893, a remote control for television was described by Nikola Tesla in U.S. Patent 613809.The Germans used remote control motorboats during WWI.he first Space Command units were expansive due to the necessary use of six vacuum tubes in the receiver units that raised the price of a television by thirty percent. In the early 1960s, after the invention of the transistor, remote controls came down in price, and in size, as did all electronics.