Angles 1 (Edexcel GCSE Maths): Flashcards

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Angles 1
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14 cards from this deck

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Acute angle measure

Less than 90°90°

Right angle measure

Exactly 90°90°

Obtuse angle measure

Between 90°90° and 180°180°

Reflex angle measure

More than 180°180°

How to name an angle using letters

Three letters with vertex in middle

Isosceles triangle properties

Two equal sides and two equal angles

Equilateral triangle properties

Three equal sides and three equal angles

Each angle in equilateral triangle

60°60°

Right-angled triangle definition

Triangle with one 90°90° angle

Hypotenuse in right-angled triangle

Side opposite right angle, longest side

Angles on a straight line sum to

180°180°

Angles around a point sum to

360°360°

Vertically opposite angles property

Always equal

Vertex position when naming angles

Always in the middle of the three letters

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