Geometry I (AQA GCSE Further Maths): Flashcards

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Angle facts
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Vertically opposite angles definition

Angles directly opposite when two lines cross

Vertically opposite angles property

Always equal in size

Adjacent angles on a straight line definition

Angles next to each other forming a straight line

Adjacent angles on a straight line sum to

180°180°

If aa and cc are vertically opposite

a=ca = c

If aa and bb are adjacent on a line

a+b=180°a + b = 180°

How many angles form when two lines intersect?

Four angles

Degrees in a straight line

180°180°

Do angle rules depend on line positioning?

No, rules work regardless of positioning

If bb and dd are vertically opposite

b=db = d

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