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Oak National Academy
Oak National Academy
Teachers
Pupils
Year 9

Surds and trigonometry

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Lessons (12)

  • Rational and irrational numbers

    In this lesson, we will explore the concept of rationality and irrationality in numbers, and learn how to classify rational and irrational numbers.
    1 Slide deck
    1 Worksheet
    1 Quiz
    1 Video

  • Introduction to Surds

    In this lesson, we will learn what a surd is and we will explore how to accurately estimate the value of a surd.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Surds and triangles

    In this lesson, we will recap how to use Pythagorean theorem to find the length of missing sides in triangles leaving the answers is surd form.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Manipulating surds

    In this lesson, we will look at basic surd rules in particular multiplication and division.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Varying the ratio of side lengths in right angle triangles

    In this lesson, we will learn about the the ratio of side lengths in right angle triangles.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • The case of 30 and 60 degrees

    In this lesson, we will look at the special cases of 30 and 60 degrees right angled-triangles.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • The sine ratio

    In this lesson, we will develop an understanding of trigonometric ratios focusing on sine.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • The sine and cosine ratios

    In this lesson, we will explore trigonometric ratios focusing on sine and cosine.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • The sine and cosine ratios for 30 and 60 degrees

    In this lesson, we will learn how to find missing sides and angles in triangles using sine and cosine for 30 and 60 degrees.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Finding missing sides using sine and cosine for any angle

    In this lesson, we will learn how to find missing sides using sine and cosine for any angle in a triangle.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Using inverse sine and cosine to find missing angles

    In this lesson, we will use inverse sine and cosine to find missing angles in triangles.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video

  • Sine and cosine graphs

    In this lesson, we will look at the graphs made by the sine and cosine functions and compare them to highlight similarities and differences.
    1 Slide deck
    1 Worksheet
    2 Quizzes
    1 Video