Which of the following is the correct fact about angles at a point?

Angles at a point add up to $360^\circ$360°.

A

Angles at a point add up to $90^\circ$90°.

B

Angles at a point add up to $180^\circ$180°.

C

Easy

Less than a minute

Find the size of the missing angle.

Find the size of the missing angle.

Find the size of the missing angle.

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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.