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.
Worked Example 2: Alternate Angles
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
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.