Lesson 4: Cross sections of three-dimensional figures

Before you have access to this lesson from the links below, click on “Materials” to see what’s covered. The exercise is expected to last for not more than 1 hour 3o minutes, and please, be ready to complete this lesson in ONE session. If you haven’t signed up for the IXL SKILLS package, the temporal login info that you purchase from the link below, will be valid for 48 hours. 

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Warmup: Drag the squares to form nets of a cube.​ See example on the left.

(1.) A net is a 2-dimensional representation of a 3-dimensional object. True or False?

(2.) Not all polygons can be opened out into a net. True or False?

Activity #1 (30 minutes)

1. Topic: Cross sections of three-dimensional figures(Applet).

2. Explainer Video: Cross sections of three-dimensional figures.

Practice Exercise (30 minutes).

Topic: Cross sections of three-dimensional figures.

Quiz Time – (Two sets: 30 minutes).

Topic: Cross sections of three-dimensional figures (to be taken while you are logged in).

  1. An applet.
  2. Explainer video on "Cross sections of three-dimensional figures".
  3. Exercise questions on "Cross sections of three-dimensional figures". The questions exhibit an increasing order of difficulty. 
  4. Two sets of quizzes on "Cross sections of three-dimensional figures". The questions exhibit an increasing order of difficulty, and an average score of 80% expected.