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.
Although many people claim television was invented by Philo Farnsworth in America, it was actually invented by John Logie Baird, a Scotsman who carried out his research in Lon â¦ don England. He first demonstrated his system in 1925 and it was in commercial use by 1929.   With Marconi having invented Radio, John Logie Baird pioneered visual communication... it was the next step up. John Logie Baird (August 13, 1888 - June 14, 1946) was a Scottish engineer and inventor of the world's first working television system in Hastings, England in 1923.