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Oak National Academy
Oak National Academy
Teachers
Pupils
Year 8

Angles in polygons

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Lessons (12)

  • Interior angles in a triangle

    In this lesson, we will learn about the interior angles in a triangle, and how to find unknown angles in various types of triangles.
    1 Slide deck
    1 Worksheet
    1 Quiz
    1 Video

  • Categorising and defining polygons

    In this lesson, we will learn about the key terminology involved in describing polygons, and begin to categorise polygons, based on certain properties.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Building shapes from triangles (Part 1)

    In this lesson, we will learn how to arrange triangles to form polygons as part of an investigation into the internal angles of polygons. This represents part 1 of a two-part lesson.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Building shapes from triangles (Part 2)

    In this lesson, we will learn how to arrange triangles to form polygons as part of an investigation into the internal angles of polygons. This represents part 2 of a two-part lesson.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Polygons and triangles

    In this lesson, we will learn that the sum of the interior angles of a polygon can be found using triangles.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Generalising angles in polygons (Part 1)

    In this lesson, we will learn how to generalise the sum of the interior angles in an n-sided polygon.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Generalising angles in polygons (Part 2)

    In this lesson, we will learn how to apply the generalisation of the total interior angles in an n-sided polygon.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Finding missing angles in polygons

    In this lesson, we will learn how to find an unknown angle in a polygon.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Exterior angles

    In this lesson, we will learn about exterior angles, and how they sum to 360 degrees.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Regular interior and exterior angles (and mean of irregular)

    In this lesson, we will learn how to calculate the mean interior and exterior angles of n-sided polygons, and solve problems based on these formulae.
    1 Slide deck
    1 Worksheet
    1 Quiz
    1 Video

  • Generalising and comparing generalisations

    In this lesson, we will combine everything learnt so far about angles in polygons to compare how specific examples relate to generalised cases.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Angle notation and problem solving

    In this lesson, we will learn about how to problem solve with angles in polygons, along with learning notations for referring to angles.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video