In this video, we solve a Cambridge Primary Checkpoint Mathematics question (Paper 1 – March 2026, 0096/01).
The question focuses on understanding angle relationships in a triangle on a straight line, especially how to use exterior angle rules to find the unknown angle.
This is a key topic in Cambridge geometry and is very common in exams.
🧠 Key Concepts
Exterior angle of a triangle
Angles on a straight line
Interior vs exterior angle relationships
Using angle facts to solve missing angles
📚 What students should learn from this question
How to identify an exterior angle correctly
How straight-line angles relate to 180°
How to break a problem into simple steps instead of guessing
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