Right angle Right angle In geometry and trigonometry, a right angle is an angle of exactly 90° (degrees), corresponding to a quarter turn. If a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles. The term is a calque of Latin "angulus rectus"; here "rectus" means "upright", referring to the vertical perpendicular to a horizontal base line. Closely related and important geometrical concepts are perpendicular lines, meaning lines that form right angles at their point of intersection, and orthogonality, which is the property of forming right angles, usually applied
Venous angle Venous angle Venous angle (Pirogoff's angle, Latin: "angulus venosus") is the junction of the internal jugular (latin: v. jugularis interna) and subclavian (latin: v. subclavia) veins at both sides of the neck. The external and the anterior jugular and the vertebral veins converge toward it. The left venous angle receives lymph from the thoracic duct (ductus thoracicus). The right venous angle receives lymph from the right lymphatic trunk (truncus lymphaticus). Truncus lymphaticus is only about 1 cm long and conveys lymph from the right side of the thorax (including parts of the liver) as well as the right arm and