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Learning objective

Utilize and understand the following geometrical terms: point, vertex, line, plane, parallel, perpendicular, perpendicular bisector, bearing, right angle, acute, obtuse, and reflex angles, interior and exterior angles, similar, congruent, and scale factor. Additionally, comprehend the vocabulary related to triangles (equilateral, isosceles, scalene, right-angled), special quadrilaterals (square, rectangle, kite, rhombus, parallelogram, trapezium), polygons (regular and irregular polygons, pentagon, hexagon, octagon, decagon), and solids (cube, cuboid, prism, cylinder, pyramid, cone, sphere, hemisphere, frustum, face, surface, edge). Furthermore, grasp the vocabulary associated with circles, including centre, radius (plural: radii), diameter, circumference, semicircle, chord, tangent, major and minor arc, sector, and segment.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE MathematicsExtended GeometrySupplement content

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Quick explanation

Utilize and understand the following geometrical terms: point, vertex, line, plane, parallel, perpendicular, perpendicular bisector, bearing, right angle, acute, obtuse, and reflex angles, interior and exterior angles, similar, congruent, and scale factor. Additionally, comprehend the vocabulary related to triangles (equilateral, isosceles, scalene, right-angled), special quadrilaterals (square, rectangle, kite, rhombus, parallelogram, trapezium), polygons (regular and irregular polygons, pentagon, hexagon, octagon, decagon), and solids (cube, cuboid, prism, cylinder, pyramid, cone, sphere, hemisphere, frustum, face, surface, edge). Furthermore, grasp the vocabulary associated with circles, including centre, radius (plural: radii), diameter, circumference, semicircle, chord, tangent, major and minor arc, sector, and segment

  • This point belongs to Geometrical terms, especially Geometrical terms outcomes.
  • You need to be able to utilize and understand the following geometrical terms: point, vertex, line, plane, parallel, perpendicular, perpendicular bisector, bearing, right angle, acute, obtuse, and reflex angles, interior and exterior angles, similar, congruent, and scale factor. Additionally, comprehend the vocabulary related to triangles (equilateral, isosceles, scalene, right-angled), special quadrilaterals (square, rectangle, kite, rhombus, parallelogram, trapezium), polygons (regular and irregular polygons, pentagon, hexagon, octagon, decagon), and solids (cube, cuboid, prism, cylinder, pyramid, cone, sphere, hemisphere, frustum, face, surface, edge). Furthermore, grasp the vocabulary associated with circles, including centre, radius (plural: radii), diameter, circumference, semicircle, chord, tangent, major and minor arc, sector, and segment.
  • The key ideas to know are Describe, Explain, and State.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeExplainState

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This objective helps connect Geometrical terms outcomes to exam-style questions, flashcards, and revision notes for Geometrical terms.

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Paper 2 structured question: Geometrical terms

Paper 2Core or Extended Mathematics2 marks

Diagram Description

Diagram of lines and angles

A diagram shows two lines AB and CD intersecting at point O. Angle AOC is 40°, and angle BOD is 50°. Lines AB and CD are drawn on a plane.

  1. a

    Calculate Calculate the size of angle AOD.

    Aim for approximately 2 distinct marking points.

    [2]
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