Hunting for circles...

We went round the school looking for circles.  We found lots of circles. We found a lock we thought it was 5cm but it was 4cm.  We found some nails we thought they were 0.5cm but it was really 1cm.

Then we went to the clock face centre, beside the scooter ramps.  We thought it was 5cm, but it was 13cm.  We looked at the tyres and we thought that they were 50cm, but they were 57cm.

Then we found a concrete circle we thought it was 30cm, but it was 31cm. Then there was a metal screw we found we thought it 2cm and we were right!