GCSE Maths (Edexcel)
435 videos | 33 hours
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Geometry and Measures
Properties and Constructions
Alternate Angles
3:05
Angles Around Parallel Lines
Spec
G3
- Alternate angles are formed when two lines are crossed by a transversal line
- Alternate angles are formed on opposite sides of the transversal
- Alternate angles can be recognized by their characteristic Z shape
- When two lines are parallel, alternate angles are equal
- Parallel lines never meet even when extended to infinity
- Knowing that one alternate angle is a certain degree can help determine the degree of the other alternate angle
- The reason why alternate angles are equal when two lines are parallel is because they correspond to vertically opposite angles
- In an example problem, the missing angle can be found by using the fact that alternate angles are equal for parallel lines
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