

Print this Height Calculator
Grid.
On the protractor
at the corner of the Height Calculator grid, mark the angle you measured
on your inclinometer. Draw a straight line that runs through the mark
on the protractor, through the corner of the grid, and all the way across
the paper.
Imagine that your eye is right by the protractor in the lower lefthand
corner of the grid. The line at the bottom of the grid is a line parallel
to the ground, at the level of your eyes. Each division on the grid represents
100 cm in the real world. Using this information and the distance you
measured in Step 7 in Using Your Inclinometer,
mark the object’s position on the bottom line of the grid.
Starting at the mark you just made, draw a straight line that’s perpendicular
to the bottom line of the grid, starting at your mark.
Now you have a triangle.
The height of this triangle tells you the distance from your eyelevel
line to the top of the object.
To get the height of the object, add the distance from the ground to your
eye level (from Step 8 in Using
Your Inclinometer) to the number you got above.
For tips on
how to use this trick with a class or group, go to the Teacher/Leader
version. 