Year 7 Maths

Kookaburra week - Lesson 5

The properties of quadrilaterals

Introduction

Watch the video below for an introduction to the lesson.

Lesson overview

Duration 1:20

Activity 1 - Classifying quadrilaterals

Task 1

  • Watch the video, Quadrilateral Family Tree.

  • In your exercise book or folder, complete the diagram as the video progresses.

Quadrilateral Family Tree

Duration 11:30

Task 2

Complete the interactive to practise classifying quadrilaterals as:

  • parallelogram

  • rectangle

  • square

  • rhombus

  • trapezium

  • kite.

Note: The shape may fit into more than one category.

Task 3

In your exercise book or folder, answer the following questions:

  1. Can you have 3 obtuse angles in a quadrilateral?

(Answer yes or no. If the answer is yes, draw the shape, labelling the sides and angles.)

  1. Can you have a quadrilateral with only 1 obtuse angle? Yes, Can you draw it?

(Answer yes or no. If the answer is yes, draw the shape, labelling the sides and angles.)

Activity 2 - Angle sum of a quadrilateral

Task 1

  • Watch the video, Angles in a Quadrilateral.

  • In your exercise book or folder, write the examples as you follow along.

Angles in a Quadrilateral

Duration 7:45

Task 2

Complete the interactive to learn how to find unknown angles using the angle sum of quadrilaterals.

Task 3

Complete the quiz to test whether you can find unknown angles of quadrilaterals.

  • Use the blue check button to check your answers and retry if you get it wrong.

  • Use the blue arrow in the bottom right hand corner to move to the next question.

Note: You may use a calculator if you wish.

Activities too easy?

Visit the Polygon Angles page on Transum.org and try to complete Levels 1, 2 and 3.

Handing in your work

Don't forget to hand in the work you completed today!

  • Your teacher will have told you to do one of the following:

    • Upload any digital documents you created and any photos you took of your written work to your Learning Management system (MS Teams, Google Classroom for example).

    • Email any digital documents you created and any photos you took of your written work to your teacher.

Make sure you keep any handwritten work you did in your exercise book or folder as your teacher may need to see these when you are back in class.