In the subjects of geometry and trigonometry, a linear pair of angles is any two adjacent angles formed together to add up to 180°, or π (pi) radians.

It’s like when you open a pair of scissors halfway. Image caption, Straight-line angle. ... Angle d and angle e are obtuse angles because they are larger than 90° but smaller than 180°.

As we know, the exterior angle plus the interior angle adds up to 180°, so the missing angles moving clockwise from the top are: 180 – 71.4 = 108.6° 180 – 56.4 = 123.6° ...

The new technique revealed pronounced variations in local twist angles in twisted bilayer graphene. (Courtesy: S Zhu) Stacking layers of two-dimensional materials on top of each other and varying the ...