A right angle is exactly 90°. It is shown by a small square. Angles that add together to make a right angle are called complementary angles. If you know one complementary angle you can subtract it ...

* From Henry Derozio to Bankim Chandra Chatterjee, Rabindranath Tagore to Dom Moraes, the essays straddle three centuries and a multitude of thoughts effortlessly * Many essays in the book deal with ...

\(x\) is 50°. Corresponding angles are equal. \(y\) is 180° - 50° = 130°. Angles on a straight line add up to 180°.