This study notes covers Worked Example within Angle Facts for GCSE Mathematics. Revise Angle Facts in Geometry & Measures for GCSE Mathematics with 14 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 4 of 5 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Worked Example
Two angles on a straight line are x° and 115°. Find x.
Solution
x + 115 = 180 (angles on a straight line)
x = 180 - 115 = 65°
Practice questions for Angle Facts
An angle measures 135°. What type of angle is this?
Two angles on a straight line are 73° and 107°. A student says: 'These two angles must be equal because they are on a straight line.' Is the student correct? Give a reason for your answer.