Obtuse angle - GCSE Maths Definition

An obtuse angle measures more than 90°, but less than 180°. An obtuse angle will combine with an acute angle, to make a 180° straight line. It will always be the larger of two such angles. Imagine opening a laptop on a desk so that the screen is tilting back from the keyboard; this would form an obtuse angle between the screen and the keyboard. (The acute angle would be formed between the back of the screen (the laptop's top!) and the desk.) In GCSE Mathematics, understanding obtuse angles enables us to solve geometric problems within shapes using angle properties and in other, related, scenarios such as bearings.