PrepWisePrepWiseAngles in Parallel Lines
Geometry & MeasuresStudy Notes

Worked Example 2: Alternate Angles

Part of Angles in Parallel Lines — GCSE Mathematics

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. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 5 of 8 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 5 of 8

Practice

12 questions

Recall

3 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

Keep building this topic

Read this section alongside the surrounding pages in Angles in Parallel Lines. That gives you the full topic sequence instead of a single isolated revision point.

Worked Example 1: Corresponding AnglesWorked Example 3: Co-interior AnglesThe Transversal DetectiveThe Three Key Rules

Practice Questions for Angles in Parallel Lines

Two parallel lines are cut by a transversal. Which statement about alternate angles is correct?

  • A. Alternate angles add up to 180°
  • B. Alternate angles are equal
  • C. Alternate angles add up to 90°
  • D. Alternate angles are supplementary
1 markfoundation

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.

2 marksstandard

Quick Recall Flashcards

Alternate Angles
Z-shape on parallel lines, equal
Co-interior Angles
C-shape on parallel lines, add to 180°

Want to test your knowledge?

PrepWise has 12 exam-style questions and 3 flashcards for Angles in Parallel Lines — with adaptive difficulty and instant feedback.

Join Alpha

Previous

Worked Example 1: Corresponding Angles

Next

Worked Example 3: Co-interior Angles