Right angle of what a right angle is, namely two straight lines intersecting to form two equal and adjacent angles. The straight lines which form right angles are called perpendicular. Euclid uses right angles in definitions 11 and 12 to define acute angles (those smaller than a right angle) and obtuse angles (those greater than a right angle). Two angles are called complementary if their sum is a right angle. Book 1 Postulate 4 states that all right angles are equal, which allows Euclid to use a right angle as a unit to measure other angles with. Euclid's commentator Proclus gave a
Larger Than Live Tracks 1-6 are new studio tracks, tracks 7-12 are live recordings. Larger Than Live Larger Than Live is the fifth studio album by heavy metal band Keel. It was released in 1989 on Gold Mountain Records. The album consists of six new studio tracks and six of the band's previous songs recorded live at The Roxy in West Hollywood, CA. It was also the only album to feature keyboardist Scott Warren and guitarist Tony Palamucci (as guitarist Marc Ferrari left the band due to creative and personal differences). Following the filming of the music video for the song "Dreams Are