In little Slices - Team E
Diameter and Circumference
Sarah and Max have to tie ropes around the tree trunk and several branches. They know the thickness (= diameter) of the branches and trunk at the various points, but still have to find out how long the rope has to be.
Max borrows a tree slice from his grandfather. It is a decoration hanging over the fireplace in grandpa's living room.
It has a diameter of 26 cm and a circumference of 82 cm.
When looking at the slice, Max and Sarah reckon with your aid, it should be fairly easy to estimate diameter and circumference.
Take the following material out of the box:
Now estimate without measuring which disc (they are numbered) has a circumference of approx. 15 cm.
Again without measuring, estimate the circumference of disc No. 4.