Sum = 180°: Mixed Review
Mathematics
GCSE Higher
10 questions
~20 mins
1 views0 downloads
About This Worksheet
A diverse worksheet focused on the key concept that co-interior angles on parallel lines sum to 180°, including procedural, reasoning, and real-world questions.
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Sum = 180°: Mixed Review
Subject: MathematicsGrade: GCSE Higher
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Untitled Worksheet
Grade GCSE Higher
A
Practice Questions
Answer all questions. Show your working in the grid spaces provided.
1.
If two co-interior angles on parallel lines are 65°, what is the measure of the other angle?
[2 marks]2.
Calculate the missing angle if one co-interior angle is 120°.
[2 marks]3.
Construct a pair of parallel lines with a transversal such that one co-interior angle measures 75°. Label the angles correctly.
[3 marks]4.
In a diagram with parallel lines cut by a transversal, two co-interior angles are 85° and x. Find x.
[2 marks]5.
Explain why the sum of co-interior angles on parallel lines is always 180°.
[3 marks]6.
Two angles, 110° and y, are co-interior angles on parallel lines. What is y? Show your working.
[2 marks]7.
A transversal crosses two parallel lines. If one co-interior angle is 45°, what are the measures of the other three angles formed on the same side?
[3 marks]8.
In a real-world scenario, two roads run parallel. A transversal road intersects them, forming angles. If one pair of co-interior angles measures 130°, what is the measure of the corresponding angles on the other side?
[3 marks]9.
Challenge: Two co-interior angles are x° and 125° on parallel lines. If x is 3 times the other angle, find x.
[3 marks]10.
Identify and correct the mistake in this reasoning: 'If two angles are co-interior and on parallel lines, then one must be 180° and the other 0°.'
[2 marks]Quick Actions
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Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet