CAIE IGCSE Mathematics Core Geometrical Vocabulary

Practise identifying circle parts, plane shapes and simple solids and using terms such as radius, chord, tangent, face and edge precisely.

Syllabus
2028–2030
Topic
C4.1
Level
Core

Exam points

  • identify a radius, diameter, chord, tangent, arc, sector or segment from a circle diagram
  • name a triangle or quadrilateral from its defining sides, angles, parallelism or symmetry
  • identify simple solids and distinguish their faces or surfaces from edges

Covered syllabus points

C4.1.1 3 Use and interpret the vocabulary of a circle

C4.1 Geometrical terms question 1

[Maximum number: 1]

The diagram shows a circle, centre O, radius 11 cm. C, F, G and H are points on the circumference of the circle.
The line AD touches the circle at C and is parallel to the line EG. B is a point on AD and angle ABO=140∘A B O=140^{\circ}.

Write down the mathematical name of the straight line AD.

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