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11.04 Angles on a straight line

Lesson

Are you ready?

Being able to identify an angle can help us in this lesson. Let's try this problem to review. 

Select the obtuse angle:

  1. A

    B

    C

    D

    A

    B

    C

    D

Learn

Let's learn more about angles on a straight line.

Apply

Find the size of the missing angle.

  1. $=$= $\editable{}$$^\circ$°

Remember!

Angles on a straight line always add up to $180$180 degrees.

Outcomes

VCMMG231

Investigate with and without digital technologies, angles on a straight line, angles at a point and vertically opposite angles. Use results to find unknown angles.

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