Eisenmenger syndrome occurs when a congenital heart defect is not detected early enough to be treated before damage to the lung arteries occurs. If you or your child receives a diagnosis of a heart defect, it's important to start treatment promptly, including having surgeries or procedures to help correct the defect.
An acute angle is an angle with a measurement between 0Â° and 90Â°, or with less than 90Â° radians. It's the smallest of six different types of angles. There's an easy way to remember that an acute angle is small: think of it as a cute angle, perhaps visualizing a cute child playing an acute angle in a play about geometry.
Noun. 1. right angle-the 90 degree angle between two perpendicular lines. grad, grade-one-hundredth of a right angle. angle-the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians.oblique angle-an angle that is not a right angle or a multiple of a right angle.n. 1. (Mathematics) the angle between two radii of a circle that cut off on the circumference an arc equal in length to one quarter of the circumference; an angle of 90Â° or Ï/2 radians. 2. at right angles perpendicular or perpendicularly.ngle-the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians. oblique angle-an angle that is not a right angle or a multiple of a right angle.