Find angle x if the alternate angle is 118°.
Step 1 Recall the rule for alternate angles
Alternate angles make a Z-shape
Alternate angles are EQUAL
Step 2 Find x
x = 118°
Reason: Alternate angles on parallel lines
This study notes covers Worked Example 2: Alternate Angles within Angles in Parallel Lines for GCSE Mathematics. Revise Angles in Parallel Lines in Geometry & Measures for GCSE Mathematics with 12 exam-style questions and 3 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 5 of 9 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Angles in Parallel Lines
Two parallel lines are cut by a transversal. Which statement about alternate angles is correct?
State the THREE angle rules that apply when a transversal crosses two parallel lines. For each rule, state whether the angles are equal or supplementary.