A clinometer is a tool that is used to measure the angle of
elevation, or angle from the ground, in a right - angled triangle.
You can use a clinometer to measure the height of tall things that
you can't possibly reach to the top of, flag poles, buildings,
trees. Follow the directions below to create your own
You will need:
To use the clinometer:
The diagram shows what the assembled clinometer will look like
when laying an a flat surface. When using it, the straw will be on
You will need two people: one to look through the straw and site
the top of an object and one to read the degrees that the string
makes with the protractor.
You, the base of the tree and the top of the tree, form an
isosceles triangle meaning the distance from you to the base of the
tree is equal to the height of the tree (from the viewer's eyes to
This activity features in our
December 2008 Advent Calendar .