Lesson

Can you work out the value of an angle on a straight line ?

Find the size of the missing angle.

Worked Solution

Idea summary

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

This video looks at angles at a point, and how to use a full revolution being equal to 360 degrees to answer problems.

Find the size of the missing angle.

Worked Solution

Idea summary

It doesn't matter how many angles are formed at a point, the sum is always 360 degrees.

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.