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Geometry and Circle Properties
Quick questions on Angles and parallel lines explained: N(A)-Level Mathematics Geometry and Circle Properties
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are vertically opposite angles?Show answer
When two straight lines cross, the angles directly opposite each other are equal. These are called vertically opposite angles. If one angle at a crossing is , the angle opposite it is also .
What are giving reasons?Show answer
Every step in a geometry answer needs a reason - the name of the rule used. For example: " (corresponding angles)." Marks are awarded for the reason as well as the value, so never leave it out.
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