Common
Intercept theorem
Theorem concerning ratios of line segments
Intercept theorem
The intercept theorem, also known as Thales's theorem, basic proportionality theorem or side splitter theorem, is an important theorem in elementary geometry about the ratios of various line segments that are created if two rays with a common starting point are intercepted by a pair of parallels. It is equivalent to the theorem about ratios in similar triangles. It is traditionally attributed to Greek mathematician Thales. It was known to the ancient Babylonians and Egyptians, although its first known proof appears in Euclid's Elements. A mechanical device which produces geometrically-similar shapes is known as a pantograph.
Open boosters, collect cards and trade them. Free to play.
Play for free