It is used during daylight hours. The balloon is filled to such degree that its ascent rate is known. By measuring the time period between the start of the balloon and the moment it hides in the cloud can be determined the height of the cloud base.
imbrication lines (imâ³bro brÃ´Â´ika shÉn) , lÄ«nz.n pl. 1 the seams which are formed by overlapping layers of tissue in order to close a surgical. wound. 2 slight mesiodistal ridges in the cervical third of a. tooth
Perpendicular lines are lines in the same plane that intersect to form a 90Â° angle. The notation for perpendicular lines is Line l â¥ Line m. This states Line l is perpendicular to Line m .. Skew lines are lines in different planes that do not intersect. Skew lines are non-coplanar lines. Parallel planes are planes that do not intersect. Perpendicular planes are planes that intersect to form a 90Â° angle.