A half turn is 180° and is known as a straight angle (or angle on a straight line). A three-quarter turn is 270°. An acute angle is less than 90°. An obtuse angle is between 90° and 180°.

Can you identify which of the below angles are acute, right angle or obtuse? Angle a is 70° so it is acute. Angles b and c are both right angles. Angles d and e are obtuse as they are 120° and ...

The use of bisphosphonates, particularly risedronate, in patients with osteoporosis is linked to a higher risk for acute angle closure but not open-angle glaucoma. Researchers conducted a ...